Sena Bluetooth SPH10 v4.2 User's Guide - Manual (Page 8)

9
SPH10
English
4.4 Low Battery Warning
When the battery is low, the blinking blue LED in
stand-by mode turns to red and you will hear mid-
tone triple beeps and a voice prompt saying “Low
battery”.
4.5 Checking the Battery Level
You can check the battery level in two different ways
when the headset is powering on.
4.5.1 LED Indicator
When the headset 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%
4.5.2 Voice Prompt Indicator
When you power on the headset, keep pressing the
Jog Dial and Phone Button simultaneously for about
3 seconds until you hear high tone triple beeps. Then
you will hear voice prompt indicating the battery
level. However, if you release the buttons as soon
as the headset turns on, you will not hear the voice
prompt of battery level indication.
5. VOLUME ADJUSTMENT
You can easily adjust the volume by rotating the Jog
Dial. You will hear a beep when the volume reaches
maximum or minimum level. The volume is set and
maintained independently at different levels for each
audio source even when you turn off and on the
headset. For example, once you set the volume for
mobile phone handsfree, it will not change even if
you adjust the volume when you hear Bluetooth MP3
music. So you can always maintain the preferred
optimum volume level for each audio source.