diff --git a/firmware/application/apps/ui_setup.cpp b/firmware/application/apps/ui_setup.cpp
index 5927ead4..31a86d48 100644
--- a/firmware/application/apps/ui_setup.cpp
+++ b/firmware/application/apps/ui_setup.cpp
@@ -216,8 +216,6 @@ void SetPlayDeadView::focus() {
 }
 
 SetUIView::SetUIView(NavigationView& nav) {
-	uint32_t ui_config;
-	
 	add_children({
 		&checkbox_login,
 		&checkbox_bloff,
@@ -226,24 +224,26 @@ SetUIView::SetUIView(NavigationView& nav) {
 		&button_ok
 	});
 	
-	ui_config = portapack::persistent_memory::ui_config();
+	checkbox_showsplash.set_value(persistent_memory::config_splash());
+	checkbox_login.set_value(persistent_memory::config_login());
 	
-	if (ui_config & 1) checkbox_showsplash.set_value(true);
-	if (ui_config & 2) checkbox_bloff.set_value(true);
-	if (ui_config & 16) checkbox_login.set_value(true);
-	options_bloff.set_selected_index((ui_config >> 5) & 7);
+	uint32_t backlight_timer = persistent_memory::config_backlight_timer();
+	
+	if (backlight_timer) {
+		checkbox_bloff.set_value(true);
+		options_bloff.set_by_value(backlight_timer);
+	} else {
+		options_bloff.set_selected_index(0);
+	}
 
-	button_ok.on_select = [&nav, &ui_config, this](Button&) {
-		ui_config &= ~0b10011;
+	button_ok.on_select = [&nav, this](Button&) {
+		if (checkbox_bloff.value())
+			persistent_memory::set_config_backlight_timer(options_bloff.selected_index() + 1);
+		else
+			persistent_memory::set_config_backlight_timer(0);
 		
-		if (checkbox_login.value()) {
-			portapack::persistent_memory::set_playing_dead(0x5920C1DF);		// Enable
-			ui_config |= (1 << 4);
-		}
-		if (checkbox_showsplash.value()) ui_config |= (1 << 0);
-		if (checkbox_bloff.value()) ui_config |= (1 << 1);
-		
-		portapack::persistent_memory::set_ui_config(ui_config);
+		persistent_memory::set_config_splash(checkbox_showsplash.value());
+		persistent_memory::set_config_login(checkbox_login.value());
 		nav.pop();
 	};
 }
diff --git a/firmware/application/apps/ui_setup.hpp b/firmware/application/apps/ui_setup.hpp
index d3cab311..d1f869c0 100644
--- a/firmware/application/apps/ui_setup.hpp
+++ b/firmware/application/apps/ui_setup.hpp
@@ -247,11 +247,11 @@ private:
 		{ 52, 6 * 16 + 8 },
 		10,
 		{
-			{ "5 seconds", 0 },
-			{ "15 seconds", 1 },
-			{ "1 minute", 2 },
-			{ "5 minutes", 3 },
-			{ "10 minutes", 4 }
+			{ "5 seconds", 5 },
+			{ "15 seconds", 15 },
+			{ "1 minute", 60 },
+			{ "5 minutes", 300 },
+			{ "10 minutes", 600 }
 		}
 	};
 	
diff --git a/firmware/application/bitmap.hpp b/firmware/application/bitmap.hpp
index 467ce441..506b9b70 100644
--- a/firmware/application/bitmap.hpp
+++ b/firmware/application/bitmap.hpp
@@ -104,7 +104,7 @@ static constexpr uint8_t bitmap_stripes_data[] = {
 	0x1F, 0x00, 0xFE, 
 	0x0F, 0x00, 0xFF, 
 	0x07, 0x80, 0xFF, 
-	};
+};
 static constexpr Bitmap bitmap_stripes {
 	{ 24, 8 }, bitmap_stripes_data
 };
@@ -810,44 +810,44 @@ static constexpr Bitmap bitmap_icon_keyfob {
 };
 
 static constexpr uint8_t bitmap_icon_biast_off_data[] = {
-	0xFF, 0xFF, 
-	0xFF, 0xFF, 
-	0x80, 0x01, 
-	0x80, 0x01, 
-	0x80, 0x01, 
-	0x00, 0x00, 
-	0x00, 0x00, 
-	0x20, 0x04, 
-	0x60, 0x06, 
-	0xC0, 0x03, 
-	0x80, 0x01, 
-	0xC0, 0x03, 
-	0x60, 0x06, 
-	0x20, 0x04, 
-	0x00, 0x00, 
 	0x00, 0x00, 
+	0xFC, 0x3F, 
+	0x00, 0x02, 
+	0x00, 0x0E, 
+	0x00, 0x18, 
+	0x00, 0x10, 
+	0x88, 0x18, 
+	0xD8, 0x0E, 
+	0x70, 0x18, 
+	0x20, 0x10, 
+	0x70, 0x18, 
+	0xD8, 0x0E, 
+	0x88, 0x18, 
+	0x00, 0x10, 
+	0x00, 0x18, 
+	0x00, 0x0E, 
 };
 static constexpr Bitmap bitmap_icon_biast_off {
 	{ 16, 16 }, bitmap_icon_biast_off_data
 };
 
 static constexpr uint8_t bitmap_icon_biast_on_data[] = {
-	0xFF, 0xFF, 
-	0xFF, 0xFF, 
-	0x80, 0x01, 
-	0x80, 0x03, 
-	0x08, 0x06, 
-	0x08, 0x04, 
-	0x0C, 0x06, 
-	0x84, 0x03, 
-	0x0E, 0x06, 
-	0x3E, 0x04, 
-	0x38, 0x06, 
-	0x90, 0x03, 
-	0x18, 0x06, 
-	0x08, 0x04, 
-	0x08, 0x06, 
-	0x80, 0x03, 
+	0x00, 0x00, 
+	0xFE, 0x7F, 
+	0x00, 0x02, 
+	0x00, 0x0E, 
+	0x20, 0x18, 
+	0x20, 0x10, 
+	0x30, 0x18, 
+	0x10, 0x0E, 
+	0x38, 0x18, 
+	0xF8, 0x10, 
+	0xE0, 0x18, 
+	0x40, 0x0E, 
+	0x60, 0x18, 
+	0x20, 0x10, 
+	0x20, 0x18, 
+	0x00, 0x0E, 
 };
 static constexpr Bitmap bitmap_icon_biast_on {
 	{ 16, 16 }, bitmap_icon_biast_on_data
@@ -1048,7 +1048,7 @@ static constexpr uint8_t bitmap_rssipwm_data[] = {
 	0x21, 0x12, 0x12, 
 	0x21, 0x12, 0x12, 
 	0xE1, 0xF3, 0x73, 
-	};
+};
 static constexpr Bitmap bitmap_rssipwm {
 	{ 24, 16 }, bitmap_rssipwm_data
 };
@@ -1100,22 +1100,22 @@ static constexpr uint8_t bitmap_tab_edge_data[] = {
 	0x03, 
 	0x07, 
 	0x07, 
-0x07, 
-0x0F, 
-0x0F, 
-0x0F, 
-0x1F, 
-0x1F, 
-0x1F, 
-0x1F, 
-0x3F, 
-0x3F, 
-0x3F, 
-0x7F, 
-0x7F, 
-0x7F, 
-0xFF, 
-0xFF, 
+	0x07, 
+	0x0F, 
+	0x0F, 
+	0x0F, 
+	0x1F, 
+	0x1F, 
+	0x1F, 
+	0x1F, 
+	0x3F, 
+	0x3F, 
+	0x3F, 
+	0x7F, 
+	0x7F, 
+	0x7F, 
+	0xFF, 
+	0xFF, 
 };
 static constexpr Bitmap bitmap_tab_edge {
 	{ 8, 24 }, bitmap_tab_edge_data
diff --git a/firmware/application/event_m0.cpp b/firmware/application/event_m0.cpp
index 2225610a..34bc2338 100644
--- a/firmware/application/event_m0.cpp
+++ b/firmware/application/event_m0.cpp
@@ -222,15 +222,13 @@ void EventDispatcher::handle_local_queue() {
 }
 
 void EventDispatcher::handle_rtc_tick() {
-	uint16_t bloff;
-	
 	sd_card::poll_inserted();
 
 	portapack::temperature_logger.second_tick();
 	
-	bloff = portapack::persistent_memory::ui_config_bloff();
-	if (bloff) {
-		if (portapack::bl_tick_counter == bloff)
+	uint32_t backlight_timer = portapack::persistent_memory::config_backlight_timer();
+	if (backlight_timer) {
+		if (portapack::bl_tick_counter == backlight_timer)
 			set_display_sleep(true);
 		else
 			portapack::bl_tick_counter++;
diff --git a/firmware/application/ui_navigation.cpp b/firmware/application/ui_navigation.cpp
index 0e9a2a87..c2ff7fdd 100644
--- a/firmware/application/ui_navigation.cpp
+++ b/firmware/application/ui_navigation.cpp
@@ -82,7 +82,10 @@ namespace ui {
 
 /* SystemStatusView ******************************************************/
 
-SystemStatusView::SystemStatusView() {
+SystemStatusView::SystemStatusView(
+	NavigationView& nav
+) : nav_ (nav)
+{
 	static constexpr Style style_systemstatus {
 		.font = font::fixed_8x16,
 		.background = Color::dark_grey(),
@@ -97,7 +100,7 @@ SystemStatusView::SystemStatusView() {
 		//&button_textentry,
 		&button_camera,
 		&button_sleep,
-		&image_bias_tee,
+		&button_bias_tee,
 		&sd_card_status_view,
 	});
 	
@@ -112,6 +115,8 @@ SystemStatusView::SystemStatusView() {
 	else
 		button_textentry.set_bitmap(&bitmap_icon_unistroke);*/
 
+	refresh();
+	
 	button_back.on_select = [this](ImageButton&){
 		if (this->on_back)
 			this->on_back();
@@ -121,6 +126,10 @@ SystemStatusView::SystemStatusView() {
 		this->on_stealth();
 	};
 	
+	button_bias_tee.on_select = [this](ImageButton&) {
+		this->on_bias_tee();
+	};
+	
 	/*button_textentry.on_select = [this](ImageButton&) {
 		this->on_textentry();
 	};*/
@@ -137,12 +146,12 @@ SystemStatusView::SystemStatusView() {
 
 void SystemStatusView::refresh() {
 	if (receiver_model.antenna_bias()) {
-		image_bias_tee.set_bitmap(&bitmap_icon_biast_on);
-		image_bias_tee.set_foreground(ui::Color::green());
+		button_bias_tee.set_bitmap(&bitmap_icon_biast_on);
+		button_bias_tee.set_foreground(ui::Color::yellow());
 	} else {
-		image_bias_tee.set_bitmap(&bitmap_icon_biast_off);
-		image_bias_tee.set_foreground(ui::Color::light_grey());
-	}	
+		button_bias_tee.set_bitmap(&bitmap_icon_biast_off);
+		button_bias_tee.set_foreground(ui::Color::light_grey());
+	}
 }
 
 void SystemStatusView::set_back_enabled(bool new_value) {
@@ -159,12 +168,11 @@ void SystemStatusView::set_title(const std::string new_value) {
 }
 
 void SystemStatusView::on_stealth() {
-	bool cfg;
+	bool mode = not portapack::persistent_memory::stealth_mode();
 	
-	cfg = portapack::persistent_memory::stealth_mode();
-	portapack::persistent_memory::set_stealth_mode(not cfg);
+	portapack::persistent_memory::set_stealth_mode(mode);
 	
-	if (!cfg)
+	if (mode)
 		button_stealth.set_foreground(ui::Color::green());
 	else
 		button_stealth.set_foreground(ui::Color::light_grey());
@@ -172,6 +180,23 @@ void SystemStatusView::on_stealth() {
 	button_stealth.set_dirty();
 }
 
+void SystemStatusView::on_bias_tee() {
+	bool antenna_bias = receiver_model.antenna_bias();
+	
+	if (!antenna_bias) {
+		nav_.display_modal("Bias voltage", "Enable DC voltage on\nantenna connector ?", YESNO, [this](bool v) {
+				if (v) {
+					receiver_model.set_antenna_bias(true);
+					refresh();
+				}
+			});
+	
+	} else {
+		receiver_model.set_antenna_bias(false);
+		refresh();
+	}
+}
+
 /*void SystemStatusView::on_textentry() {
 	uint8_t cfg;
 	
@@ -434,7 +459,7 @@ SystemView::SystemView(
 		(portapack::persistent_memory::ui_config() & 16)) {					// Login option
 		navigation_view.push<PlayDeadView>();
 	} else {*/
-		if (portapack::persistent_memory::ui_config() & 1)
+		if (portapack::persistent_memory::config_splash())
 			navigation_view.push<BMPView>();
 		else
 			navigation_view.push<SystemMenuView>();
diff --git a/firmware/application/ui_navigation.hpp b/firmware/application/ui_navigation.hpp
index 3c843404..ee8f49e2 100644
--- a/firmware/application/ui_navigation.hpp
+++ b/firmware/application/ui_navigation.hpp
@@ -53,17 +53,58 @@ enum modal_t {
 	ABORT
 };
 
+class NavigationView : public View {
+public:
+	std::function<void(const View&)> on_view_changed { };
+
+	NavigationView() = default;
+
+	NavigationView(const NavigationView&) = delete;
+	NavigationView(NavigationView&&) = delete;
+	NavigationView& operator=(const NavigationView&) = delete;
+	NavigationView& operator=(NavigationView&&) = delete;
+
+	bool is_top() const;
+
+	template<class T, class... Args>
+	T* push(Args&&... args) {
+		return reinterpret_cast<T*>(push_view(std::unique_ptr<View>(new T(*this, std::forward<Args>(args)...))));
+	}
+	
+	void push(View* v);
+
+	void pop();
+	void pop_modal();
+
+	void display_modal(const std::string& title, const std::string& message);
+	void display_modal(const std::string& title, const std::string& message, const modal_t type, const std::function<void(bool)> on_choice = nullptr);
+
+	void focus() override;
+
+private:
+	std::vector<std::unique_ptr<View>> view_stack { };
+	Widget* modal_view { nullptr };
+
+	Widget* view() const;
+
+	void free_view();
+	void update_view();
+	View* push_view(std::unique_ptr<View> new_view);
+};
+
 class SystemStatusView : public View {
 public:
 	std::function<void(void)> on_back { };
 
-	SystemStatusView();
+	SystemStatusView(NavigationView& nav);
 
 	void set_back_enabled(bool new_value);
 	void set_title(const std::string new_value);
 
 private:
 	static constexpr auto default_title = "PortaPack|Havoc";
+	
+	NavigationView& nav_;
 
 	Rectangle backdrop {
 		{ 0 * 8, 0 * 16, 240, 16 },
@@ -110,8 +151,8 @@ private:
 		Color::dark_grey()
 	};
 	
-	Image image_bias_tee {
-		{ 26 * 8, 0, 2 * 8, 1 * 16 },
+	ImageButton button_bias_tee {
+		{ 26 * 8, 0, 12, 1 * 16 },
 		&bitmap_icon_biast_off,
 		Color::light_grey(),
 		Color::dark_grey()
@@ -122,6 +163,7 @@ private:
 	};
 
 	void on_stealth();
+	void on_bias_tee();
 	//void on_textentry();
 	void on_camera();
 	void refresh();
@@ -135,45 +177,6 @@ private:
 	};
 };
 
-class NavigationView : public View {
-public:
-	std::function<void(const View&)> on_view_changed { };
-
-	NavigationView() = default;
-
-	NavigationView(const NavigationView&) = delete;
-	NavigationView(NavigationView&&) = delete;
-	NavigationView& operator=(const NavigationView&) = delete;
-	NavigationView& operator=(NavigationView&&) = delete;
-
-	bool is_top() const;
-
-	template<class T, class... Args>
-	T* push(Args&&... args) {
-		return reinterpret_cast<T*>(push_view(std::unique_ptr<View>(new T(*this, std::forward<Args>(args)...))));
-	}
-	
-	void push(View* v);
-
-	void pop();
-	void pop_modal();
-
-	void display_modal(const std::string& title, const std::string& message);
-	void display_modal(const std::string& title, const std::string& message, const modal_t type, const std::function<void(bool)> on_choice = nullptr);
-
-	void focus() override;
-
-private:
-	std::vector<std::unique_ptr<View>> view_stack { };
-	Widget* modal_view { nullptr };
-
-	Widget* view() const;
-
-	void free_view();
-	void update_view();
-	View* push_view(std::unique_ptr<View> new_view);
-};
-
 class BMPView : public View {
 public:
 	BMPView(NavigationView& nav);
@@ -227,7 +230,7 @@ public:
 	Context& context() const override;
 
 private:
-	SystemStatusView status_view { };
+	SystemStatusView status_view { navigation_view };
 	NavigationView navigation_view { };
 	Context& context_;
 };
diff --git a/firmware/application/ui_playdead.cpp b/firmware/application/ui_playdead.cpp
index 36896d93..83537c9d 100644
--- a/firmware/application/ui_playdead.cpp
+++ b/firmware/application/ui_playdead.cpp
@@ -24,6 +24,8 @@
 #include "portapack_persistent_memory.hpp"
 #include "string_format.hpp"
 
+using namespace portapack;
+
 namespace ui {
 	
 void PlayDeadView::focus() {
@@ -31,10 +33,10 @@ void PlayDeadView::focus() {
 }
 
 void PlayDeadView::paint(Painter& painter) {
-	if (!(portapack::persistent_memory::ui_config() & 16)) {
+	if (persistent_memory::config_login()) {
 		// Blank the whole display
 		painter.fill_rectangle(
-			portapack::display.screen_rect(),
+			display.screen_rect(),
 			style().background
 		);
 	}
@@ -43,7 +45,7 @@ void PlayDeadView::paint(Painter& painter) {
 PlayDeadView::PlayDeadView(NavigationView& nav) {
 	rtc::RTC datetime;
 	
-	portapack::persistent_memory::set_playing_dead(0x5920C1DF);		// Enable
+	persistent_memory::set_playing_dead(0x5920C1DF);		// Enable
 	
 	add_children({
 		&text_playdead1,
@@ -64,9 +66,9 @@ PlayDeadView::PlayDeadView(NavigationView& nav) {
 	};
 	
 	button_seq_entry.on_select = [this, &nav](Button&){
-		if (sequence == portapack::persistent_memory::playdead_sequence()) {
-			portapack::persistent_memory::set_playing_dead(0x82175E23);		// Disable
-			if (!(portapack::persistent_memory::ui_config() & 16)) {
+		if (sequence == persistent_memory::playdead_sequence()) {
+			persistent_memory::set_playing_dead(0x82175E23);		// Disable
+			if (persistent_memory::config_login()) {
 				text_playdead3.hidden(false);
 			} else {
 				nav.pop();
diff --git a/firmware/common/portapack_persistent_memory.cpp b/firmware/common/portapack_persistent_memory.cpp
index 7d8e7478..dacc2263 100644
--- a/firmware/common/portapack_persistent_memory.cpp
+++ b/firmware/common/portapack_persistent_memory.cpp
@@ -80,6 +80,7 @@ struct data_t {
 	uint32_t playing_dead;
 	uint32_t playdead_sequence;
 	
+	// UI
 	uint32_t ui_config;
 	
 	uint32_t pocsag_last_address;
@@ -203,49 +204,50 @@ void set_playdead_sequence(const uint32_t new_value) {
 }
 
 bool stealth_mode() {
-	return ((data->ui_config >> 3) & 1) ? true : false;
+	return (data->ui_config & 0x20000000UL) ? true : false;
 }
 
-void set_stealth_mode(const bool new_value) {
-	data->ui_config = (data->ui_config & ~0b1000) | ((new_value & 1) << 3);
+void set_stealth_mode(const bool v) {
+	data->ui_config = (data->ui_config & ~0x20000000UL) | (v << 29);
 }
 
-uint32_t ui_config() {
-	uint8_t bloff_value;
-	
-	// Cap value
-	bloff_value = (data->ui_config >> 5) & 7;
-	if (bloff_value > 4) bloff_value = 1;		// 15s default
-
-	data->ui_config = (data->ui_config & 0x1F) | (bloff_value << 5);
-	
-	return data->ui_config;
+bool config_splash() {
+	return (data->ui_config & 0x80000000UL) ? true : false;
 }
 
-uint16_t ui_config_bloff() {
-	uint8_t bloff_value;
-	uint16_t bloff_seconds[5] = { 5, 15, 60, 300, 600 };
-	
-	if (!(data->ui_config & 2)) return 0;
-
-	// Cap value
-	bloff_value = (data->ui_config >> 5) & 7;
-	if (bloff_value > 4) bloff_value = 1;
-
-	return bloff_seconds[bloff_value];
+bool config_login() {
+	return (data->ui_config & 0x40000000UL) ? true : false;
 }
 
-void set_config_textentry(uint8_t new_value) {
+uint32_t config_backlight_timer() {
+	const uint32_t timer_seconds[8] = { 0, 5, 15, 60, 300, 600, 600, 600 };
+
+	return timer_seconds[data->ui_config & 0x00000007UL];
+}
+
+void set_config_splash(bool v) {
+	data->ui_config = (data->ui_config & ~0x80000000UL) | (v << 31);
+}
+
+void set_config_login(bool v) {
+	data->ui_config = (data->ui_config & ~0x40000000UL) | (v << 30);
+}
+
+void set_config_backlight_timer(uint32_t i) {
+	data->ui_config = (data->ui_config & ~0x00000007UL) | (i & 7);
+}
+
+/*void set_config_textentry(uint8_t new_value) {
 	data->ui_config = (data->ui_config & ~0b100) | ((new_value & 1) << 2);
 }
 
 uint8_t ui_config_textentry() {
 	return ((data->ui_config >> 2) & 1);
-}
+}*/
 
-void set_ui_config(const uint32_t new_value) {
+/*void set_ui_config(const uint32_t new_value) {
 	data->ui_config = new_value;
-}
+}*/
 
 uint32_t pocsag_last_address() {
 	return data->pocsag_last_address;
diff --git a/firmware/common/portapack_persistent_memory.hpp b/firmware/common/portapack_persistent_memory.hpp
index 5ff21dd6..edaf3696 100644
--- a/firmware/common/portapack_persistent_memory.hpp
+++ b/firmware/common/portapack_persistent_memory.hpp
@@ -69,15 +69,18 @@ uint32_t playdead_sequence();
 void set_playdead_sequence(const uint32_t new_value);
 
 bool stealth_mode();
-void set_stealth_mode(const bool new_value);
+void set_stealth_mode(const bool v);
 
-uint32_t ui_config();
-void set_ui_config(const uint32_t new_value);
+bool config_splash();
+bool config_login();
+uint32_t config_backlight_timer();
 
-uint16_t ui_config_bloff();
+void set_config_splash(bool v);
+void set_config_login(bool v);
+void set_config_backlight_timer(uint32_t i);
 
-uint8_t ui_config_textentry();
-void set_config_textentry(uint8_t new_value);
+//uint8_t ui_config_textentry();
+//void set_config_textentry(uint8_t new_value);
 
 uint32_t pocsag_last_address();
 void set_pocsag_last_address(uint32_t address);
diff --git a/firmware/graphics/icon_biast_off.png b/firmware/graphics/icon_biast_off.png
index 092b6073..4fd35315 100644
Binary files a/firmware/graphics/icon_biast_off.png and b/firmware/graphics/icon_biast_off.png differ
diff --git a/firmware/graphics/icon_biast_on.png b/firmware/graphics/icon_biast_on.png
index 595ee4e2..054d8460 100644
Binary files a/firmware/graphics/icon_biast_on.png and b/firmware/graphics/icon_biast_on.png differ
diff --git a/firmware/portapack-h1-havoc.bin b/firmware/portapack-h1-havoc.bin
index b04efc3e..5d3fb694 100644
Binary files a/firmware/portapack-h1-havoc.bin and b/firmware/portapack-h1-havoc.bin differ
diff --git a/firmware/tools/make_bitmap.py b/firmware/tools/make_bitmap.py
index e5f4f21c..7c3c6ea6 100755
--- a/firmware/tools/make_bitmap.py
+++ b/firmware/tools/make_bitmap.py
@@ -62,9 +62,9 @@ def convert_png(file):
 			if j % 8 == 7:
 				f.write("0x%0.2X, " % data)
 				data = 0
-
+		
 		f.write("\n")
-		if i < rgb_im.size[0] - 1:
+		if i < rgb_im.size[1] - 1:
 			f.write('	')		# Tab
 
 	f.write("};\n")