Quick Guide · Everyday controls
Power & battery
When Headii is off, hold + for 3 seconds, then release.
1
Turn on or off
Hold + for 3 seconds. The light turns green for 1 second at power-on, or red for 1 second just before power-off. Release + between holds. Blue flashes after power-on indicate pairing or automatic reconnection.
2
Check the battery
While wearing Headii with no audio, call, or video recording active, press + or − to hear the battery level.
3
During calls or updates
Headii cannot be turned off with a button hold during a call, incoming call, or device update.
Battery high: 80% or above. Battery medium: above 20% and below 80%. Battery low: 20% or below.