Bluetooth 5.3 Connectivity: Ultra-low latency keeps synchronized with audio and video, convenient to keep in contact with your teammates all the time Wonderful Music Feast: Built-in powerful 16.2mm driver unit, it can deliver 360° surrounding sound quality, let you listen to wonderful music Noise Cancelling Design: Use ENC noise cancelling chip to isolate external noise, allowing you to have a quiet environment and enjoy more crystal-clear music Comfortable to Use: No need to jam the earphones into the ear, so as to better protect the hearing. Unlike in-ear headphones, it allows you to keep in touch and understand the surrounding environment to ensure safety Waterproof Design: Designed with waterproof shell to professionally protect the interior from the influence of water and sweat and prolong the service life Specification: Bluetooth chip: JL6983D4 Bluetooth version: Bluetooth V5.3 Bluetooth protocols: HFP, SMP, A2DP, AVRCP, SPP, PBAP, SDP Transmission distance: straight line ≥ 10 meters Battery capacity: charging bin: 300mAh; earphone: 110mAh*2 Music playback time: about 14 hours Talk time: about 9 hours Charging time: about 2 hours Charging interface: Type-C, DC 5V 300mA Speaker: φ16.2mm, 32Ω OWS speaker Waterproof level: IPX4