Hi there and welcome
To re-pair it, please do the following
Turn the headset on and then put it on.Tap the voice button and then say "pair" or press and hold the call button until you hear "pairing."Activate Bluetooth on your phone and set it to search for new devices.Select "PLT_Legend." If your phone asks for a passcode, enter four zeros (0000); otherwise, accept the connection. NOTE: Not all phones prompt for a passcode.Once successfully paired, you will hear "pairing successful."
Let me know please how you go