1. In the off state, long press the side switch button for 6 seconds to enter pairing mode (at this time the TX indicator light will flash blue/green quickly)

2. After the RX is connected to the phone, long press the bottom button for 6 seconds to enter pairing mode (at this time the RX indicator light will flash blue quickly)

TX and RX need to enter pairing mode simultaneously; both TX and RX indicator lights will flash quickly, indicating that pairing is in progress. When the indicator light remains lit, it indicates that pairing is successful. If pairing is not successful within 60 seconds, it will automatically exit pairing mode.