1: Go to the Bluetooth setting on your cellphone, unpair the device.
If you didn't pair the TWS to your cellphone, go to step 2 directly.
2: Put both earbuds in the case.
3: Take out the left earbud, wait for around 17 seconds. Then you
will see the red and blue lights flashing alternatively.
4: Short touch (tap) the left earbud for 3 times, then you will see
the light turn to red light and flash for less than 1 sec, then
PS: Step 4 will not be easily activated in case of misuse.
If you fail to do step 4, do this step again.
5: When Step 4 is done, put the left earbud back to the case.
6: Do the same operation for the right earbud.