Product parameters Built-in memory: 16G (memory version) Headphone type: true bone conduction sports headphones Bluetooth version: Bluetooth V5.0 chip Transmission distance: more than 10 meters Frequency response range: 20Hz~20KHz Battery capacity: 280mAh Playing time: about 8 hours Charging time: 1 hour Charging interface: TYPE-C Operating temperature: -20C~70C Style: Bluetooth version/memory version (optional) Color: as pictured Material: ABS+Titanium alloy Specifications: Ergonomic DesignErgonomic design on the ear, multi-point support, comfortable and stable, can not fall off when running, climbing, skateboarding, doing burpees Does not fit into the earIt is truly painless to wear for a long time, and it is light beyond imagination, bringing you a feeling of wearing without feeling, and it is so beautiful that you cannot relax Memory versionComes with 16G memory tone / blue-on mode to completely release your hands, the headset is equipped with 2000 DJ hot songs that have been downloaded, no need to connect to Bluetooth 10-day standbyEasy to deal with various trainings and meet the needs of daily use. Full of motivation, let's run now IPX6 waterproofcan be splashed and splashed, no fear of sweat, the coating process will escort your sports 360-degree bending at willRear hanging titanium alloy, strong and durable, easy to twist 360 degrees without deformation Package Included: 1*earphone 1*type-c charging cable