Do you have a question about the shokz Loop100 and is the answer not in the manual?
Start pairing by holding the Volume+ button until the LED indicator flashes red and blue.
Connect USB adapter to PC, observe rapid blue LED. Connection confirmed by audio cues and solid blue LED.
Set Shokz Loop100 as default audio device in OS settings for music and calls.
Pair headset by holding button for 2s (rapid blue LED). Reconnect by clicking once (blue LED every second).