Quick Start Guide
4 
Compass Page (Only applied for model with such feature available) 
Button Definition 
Button 
Description 
1.  POWER/ESC 
Press for 2 seconds to turn on/off device.   
When device is on, quickly press this button will turn 
on/off the backlight. 
Press and hold this button for 10 seconds to do hardware 
reset if the system is halted. 
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