In case you want to delete all your settings from Suunto Sonic, you can reset the product. While Suunto Sonic is charging, keep the multifunction button pressed for 5 seconds. When the LED light alternately blinks red and white once and the headphones play a sound, the reset is successful.
After the reset, the Bluetooth pairing records are deleted from the headphones. When you want to use the headphones again, you have to start the pairing process from the beginning. See Pairing.