Sena Intercom 30K Manual Del Usuario página 16

Visual Method
VISUAL METHOD [icon] = Phone Button + Jog Dial - Hold 1s [icons]
2. Audible method: press and hold the Phone Button and Jog Dial for more than 3 seconds as
the headset powers on. A prompt will announce the remaining battery level.
Audible Method
AUDIBLE METHOD [icon] = Phone Button + Jog Dial - Hold 5s [icons]
"Battery level high/medium/low" [Voice Prompt]
Note: Blinking LEDs alternate from blue to red when battery power is low.