User's Manual

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2.2 LED Behaviors
Bluetooth LED (Blue)
Status Description
Blink once per three seconds Not linked
Blink once per second Linked
GNSS LED (Green)
Status Description
Blink once per second Position fixed
Steady on Position not fixed
Power LED (Red/Amber)
Status Description
Red light steady on Battery low
Red light Off Battery good
Amber light steady on(charging) Battery charging
Amber light Off(charging) Battery charging finish
2.3 Power Button
Action Function
Press and hold the button for 1 second while off Power turned on
Press and hold the button for 1 second while on Power turned off
2.4 Power-saving function
When BT-821G doesn’t connect to charger and turning on, if the Bluetooth is not
connected to any devices within 10 minutes, BT-821G will turn off the power
automatically, and all the LED will go off simultaneously.