Earbuds; External Antenna; Getting Started; Charging - Sena 20S User Manual

20S

3.4 Earbuds

If you want to wear your own earbuds, connect the earbuds to the
earbud port on the left side of the clamp. You can connect your
earbuds to the clamp while having the speakers connected to the
clamp. The sound of the earbuds will be active while the sound of the
outer speakers becomes inactive.

3.5 External Antenna

To extend the intercom distance, you may unfold the external antenna
from the main unit. Push the antenna towards the helmet slightly and
it will flip upwards. The antenna works most effectively when facing
towards the sky.
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4 GETTING STARTED

4.1 Charging

The LED turns red while the headset is charging and turns blue when
it is fully charged. It takes about 2.5 hours to be completely charged.

4.2 Low Battery Warning

When the battery is low, the blinking blue LED in stand-by mode turns
to red and you will hear three, mid-toned beeps and a voice prompt
saying "Low Battery".

4.3 Checking the Battery Level

You can check the battery level in two different ways when the headset
is powering on.
4.3.1 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%