HD313 Earhook OWS Noise Reduction Bluetooth Earphone Subwoofer Sport Wireless Headset 1. Shaft-type wearing system, unique 120-degree adjustable rotation angle design, you only need to turn it slightly when you wear it, you can find the most comfortable wearing angle between the earphone and the ear, and immediately bring you an incomparable ear fit wearing experience. 2. Adopt an open design to realize the revolutionary listening experience of "not in the ear" + "true wireless", and realize a new form of wireless and unfettered listening while having beautiful sound quality. 3. Sensitive touch, one-handed operation makes it easier to switch songs and make calls 4. Large sounding unit, combined with the design of the cavity that does not enter the ear, the open, transparent and natural sense of hearing is intoxicating 5. The body is designed according to ergonomics, and the gravity distribution of the earphones is optimized without worrying about the earphones shaking or falling off Parameter: 1. Bluetooth version: BT5.3 2. Sound unit: circular horn with a diameter of 16.2mm 3. Sensitivity: the typical value is not less than 100dB 1KHz 4. Power: rated power not less than 100mW, maximum power 200mW 5. Battery capacity: 65mAh 6. Playing time: 6 hours of music, 6 hours of talk (depending on battery capacity) 7. Charging method: magnetic suction thimble contact charging 8. Charging time: no more than 2 hours 9. Support 2 Bluetooth devices to connect at the same time, which can be switched quickly