9
This unit has protection circuit against overcharge. The circuit will stop charging when battery is fully
charged even power cord is plugged.
Useful hint: You can still operate during charging.
9
No Sound Output
Be sure transmitter and receiver stay at same channel.
Be sure volume control on transmitter and receiver are turned properly.
Be sure Master is turned properly.
Be sure Mute button is not on.
Check if transmitter and receiver stay at same frequency band.
Check if there is huge air interference nearby.
Failed to Power On
Be sure batteries are allocated and put in correct direction.
Be sure power adapter is plugged well.
Troubleshooting
DO NOT put the unit in the sunshine for a long time, or any other hot, humid environments or places
with flame. Stay away from any occasions where situation mentioned above might occur. Store the
unit in general indoor temperature or in cool circumstance.
Avoid heat, humidity
Charge BEFORE you start using for the fist time
After unpacking the unit for the first time, please charge the unit for about 8 hours. This is absolutely
necessary as the built-in rechargeable battery might have been discharged naturally due to long
transportation and storage time, even though it has been fully charged in the factory prior to shipment.
To secure a longer life for battery, please MUST execute this IMPORTANT process.
Charge fully
Ensure battery is fully charged BEFORE you store the unit. To remain a longer battery life and better
performance, make sure you charge the battery regularly every month.
When you need to use the unit again after a long period of storage, make sure you charge it
fully for at least 8 hours BEFORE any operations.
Please also charge this unit every time right after operation to secure a longer battery life.
This unit has DOD (depth of discharge) protection design. When Power Switch LED flashes red
which means there isn’t enough electricity (when operating via the battery’s power - this unit
will turn off automatically in a short time secure battery from deep-discharging damage. At this
moment please immediately recharge your unit, do not continue with operation.
Battery replacement
Get screws off
Get connection right –
RED for Anode;
BLACK for Cathode
Take battery out
