I opened it, but the details of the appearance don't quite click with me, so I'm putting it up for sale. Ultra-lightweight wireless earphones with IPX5 water resistance, providing 360° sound. - Model Name: Monster Airstar C01 - Weight: 4.2g per ear - Design: Downward design - Waterproof Rating: IPX5 waterproof - Bluetooth Version: Bluetooth 6.0 - Sound Characteristics: 360° Surround Sound - Battery Performance: Extra-long battery life - Stability: Stable and secure Thank you for viewing.