How to open the earphone? Switch the “on” key and wait five second, you will see the red and blue indicator flash, it is open successful. How to judge the battery is full charged? When charging, the indicator is red, when full charged,the indicator is blue. How to pair the bluetooth? When you open the earphone successful, open phone bluetooth, serch for “B41” bluetooth. How to connect two phone in the same time? First connecting “A” phone, then turn off the bluetooth of “A” phone. Then connecting “B” phone and turn on the bluetooth of “A” phone. At last the “A” phone will automatically connect the earphone.