1. Put both headphones into the charging case, and the indicator light will be displayed in the charging state.
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2. Press and hold the function keys on each headset until the indicator turns red and keeps flashing.
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3, when the indicator light flashes twice, release the function key, then the indicator light will change back to the charging state.
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4, turn on the Bluetooth of the mobile phone, and close the charging box cover of the Bluetooth headset, and then re-open the cover and complete the connection with the mobile phone.
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5, take out the headset after normal use can be restored to binaural mode, pay attention to do not switch to monaural mode.