Q1 : No sounds from one or two side speaker.
A1 : Check device plug, needs to firmly connected.
Q2 : Can it be recharged from bike USB charger
while riding?
A21
：
Not recommended, unstablized power source
will cause damage on internal circuit, may cause
unable to recharge/can't fully charged/can't switch on.
A22 : Power bank is a good choice.
Q3 : When using radio, not transmission or
continuous transmission.
A3 : Pls check whether plug the 2.5mm pin deeply
enough.this pin built in waterproof parts,It is easily
misunderstand it have been pluged well because of a
little resistance.
Q4 : New device can't switch on.
A4 : Recharged at least 30mins before use.
14.Q&A
19
English
Summary of Contents for M1-S PRO
Page 1: ...PRO PRO...
