Specification : Bluetooth version: 5.3 Headphone battery capacity: 60mAh Transmission distance: about 10m Playing time: 3.5 hours Talk time:2.5 hours Charging times:3 times Charging time: 1.5h waterproof level?IPX5 Support system: all devices and mobile phones that support Bluetooth Notes: 1. Please read the instruction manual carefully before use. 2. If you receive a defective product or have any questions during use, please feel free to contact us. Packing List: mini wireless earbud1 Charging cable1 User Manual1