Factory reset
To reset the Duo to factory settings, hold the settings button for 
about 3 seconds.
Press the delete settings button. 
In the reset screen, press the tick button to do a factory reset or the 
cross(x) button to exit and return to the main results screen.
Press the back arrow at any time to exit and return to the results 
screen.
In the factory reset menu, the battery percentages of both the display 
unit and the traverse unit will be displayed along with their Bluetooth 
address. 
 
The factory reset function works only when the Duo is paired (either 
via Bluetooth or in connected mode).
DU 001343OD8E80  89%
TU 001343OD8E80  89%