Charge the headphones fully before first use via USB or solar power. Turn on the device and pair it with your Bluetooth-enabled device by selecting “Beluga M1” from the available list. Use the control buttons to adjust volume, switch tracks, and manage calls. Avoid exposing the headphones to excessive heat, moisture, or direct sunlight for prolonged periods despite their solar function. Do not disassemble, puncture, or attempt to replace the battery. Keep out of reach of children and store in a cool, dry place when not in use. Electronic