AWEI TZ12 Air Conduction Bluetooth-compatible Headset OWS Ear Hook Wireless Headphone Waterproof Earphone - Black Bluetooth-compatible 5.4 Connectivity: Ultra-low latency keeps synchronized with audio and video,convenient to keep in contact with your teammates all the time Compact Size: The compact body fits easily in your pocket,convenient to carry when traveling,cycling,etc Creating Wonderful Music: Adopts advanced 14mm dynamic sound unit to provide dynamic stereo sound quality Ear Hook Design: No need to jam the earphones into the ear 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 Earphones: Professionally protect the interior from the influence of water and sweat and prolong the service life Specification: Bluetooth-compatible version: V5.4 (Chip: AB5656C2) Channel system: Stereo Supported protocols: HSP,HFP,A2DP,AVRCP Battery capacity: Earphone: 50mAh * 2 (without protection board,earphone board lithium battery protection IC); Charging bin: 300mAh (with protection board) Music playback time: 8h Talk time: 7h Charging time: 1h Speaker diameter: 14mm Speaker impedance: 32Ω Charging input: DC 5V Sensitivity: 115±3 DBDB Bluetooth-compatible operating frequency: 2402-2480MHz Frequency response range: 20HZ-20KHZ Maximum transmission distance: 10M Voice prompt: Supported Multi-point connection: Not supported Wearing method: Ear hook Waterproof level: IPX4 waterproof and sweatproof function (earphone only,charging bin is not waterproof) Charging interface: Type-C Package included: 1 Pair x Earphone 1 x Charging Bin 1 x Charging Cable 1 x English and Chinese User Manual Other things not included