Sena Bluetooth SM10 v1.1 User's Guide - Manual (Page 11)

English
11
4.1 Power ON & OFF
To power on the SM10, slide the Power Switch to on. The Blue
and Red LEDs will turn on. To power off, slide the Power Switch
to off.
4.2 Battery Check
You can check the battery level when the SM10 is powering on.
4.2.1 LED Indicator
When the SM10 is powering on, the Red LED flashes rapidly
indicating the battery level.
4 flashes = High, 70~100%
3 flashes = Medium, 30~70%
2 flashes = Low, 0~30%
4.3 Charging
It takes about 3 hours to be completely charged. The Charging
LED becomes solid blue from solid red when it is completely
charged.
4. POWERING ON/OFF AND CHARGING