GSP 370 - How to perform factory reset
1. Turn off the device by putting the slider button in the up position, then hold the slider button down for 2 seconds until the LED flashes blue and red.
2. Insert the dongle to your USB port, and leave it for 6 seconds then remove it. Insert it again, and it will start pairing.
3. LED emits purple light while the headset is looking for the dongle to be paired. If the connection is established LED lights blue for 1 seconds, then LED stops lighting.