It needs to be charged to activate a battery before first use. This machine is compatible with most charging cables on the market. If it cannot be charged, replace the charging cable and try again
The two-channel matching method is as follows
1. Turn off a phone's Bluetooth function
2. Put on both headphones and touch the detection area at the same time for 5 seconds until shutdown (Shutdown warning sound appears)
3. Touch detection area at the same time for 5 seconds to turn on (power on alert sound appears)
4. Wait until the headset is paired (the pairing tone appears)
5. Sides and sides prompt left channel headset, right channel indicates pairing is complete and dual channel mode has been entered successfully
(Pairing time is affected by environment. If pairing fails for a long time, follow above steps again)