Features: Open-ear design closes to the ear bone, sound waves directly transmitted to the acoustic system to enjoy high-quality music while not hurting the ear. Bone conduction technology delivers music through your cheekbones, ensuring ears remain completely open to ambient sounds for maximum situational awareness during long-term wear. Lightweight body design with rubber hanger creates a golden triangle wearing stability, long-wearing without pain, wear it without falling when you do sports. The large dynamic diaphragm is used for directional audio transmission without loss, creating a realistic surround sound field. TPE material, skin-friendly, non-irritating. Specifications: BT version: V5.0 Standby time: 140 hours Talk time: about 8 hours Music time: about 7 hours Communication distance: 10 meters Waterproof rating: IPX 5 BT protocol: HFP/A2DP/HSP/AVR CP Package size: 16*11.2*5cm Package weight: 130g Package List: 1 * Headphone 1 * User Manual 1 * USB Cable