1. Display LED (green)
   Lights up when the AiRScouter is on and an image is being projected on the display.
    
2. Key Lock LED (orange)
   Lights up when button operation on the Control Box is disabled.
    
3. Internal battery LED (orange)
   Lights up when the Control Box is being powered by the internal battery.
    
4. External power LED (orange)
   Lights up when the Control Box is being powered by the AC adapter or by an external battery (e.g., third-party USB battery).

 
The LED indicators light up or flash to show the status of the AiRScouter.  The following illustrations indicate the meanings of colors and flashing patterns of the LED indicators.

or	LED indicator lights up in the color shown
or	LED indicator flashes in the color shown * The flashing patterns depend on the status shown in the tables below.
	LED indicator is off

Display LED (green)

State	Name	Description
	Display ON	The AiRScouter is receiving a compatible video signal from an external device.
(Slowly)	Operating	The Control Box is processing the video signal.
(Quickly)	No input	The AiRScouter is not receiving a compatible video signal from an external device.
	Power OFF	The AiRScouter is powered off. To power it on, press the Power button.

 
Key Lock LED (orange)

State	Name	Description
	Key Lock ON	Button operation on the Control Box is disabled.
	Key Lock OFF	Button operation on the Control Box is enabled.

 
Internal battery LED (orange)

State	Name	Description
	Battery level high	The internal battery’s state of charge is full.
(Slowly)	Battery level medium	The internal battery’s state of charge is half.
(Quickly)	Battery level low	The internal battery’s state of charge is low.
	No battery	The internal battery is fully discharged.

 
External power LED (orange)  When the AC adapter is connected:

State	Name	Description
	Working	The AiRScouter is being powered by the AC adapter.
(Slowly)	Charging	The internal battery is being charged by the AC adapter.
(Quickly)	Charging error	An error has occurred while the internal battery was charging.
	Full charge	The internal battery is fully charged.

 
External power LED (orange)  When an external battery is connected:

State	Name	Description
	Working	The AiRScouter is being powered by an external battery.
(Quickly)	Connection error	An error has occurred while an external battery was supplying power.
	No battery	The external battery’s state of charge is low. If the internal battery is charged, the AiRScouter will switch to using it for power (see internal battery LED.)