Features: Comfortable to Wear: Ergonomic fit ear design, multi-point support, even when you do strenuous exercise, you do not have to worry about it will shift and fall off. IPX5 Level Waterproof: Multi-process tight design for the headset to provide a full range of splash waterproof protection, even running fitness is not afraid of rain and sweat. HIFI Sound: With moving coil unit, rich layers, more surging and powerful bass, bringing you pure and lossless sound quality, so you can enjoy. Bluetooth-compatible 5.2 Chip: The connection is faster and more stable, and it consumes less power and has less latency. After-service: If you have any questions after receiving the product, please feel free to contact us and we will provide you with a satisfactory answer. Specification: Bluetooth-compatible Version: 5.2 Transmission Distance: 10 meters Headset Battery: 300MAH Rechargeable Battery: 2200MAH Listening / Talking Time: 68 hours Charging Time: 2 hours Frequency: 20Hz-20KHz Impedance: 32 Sensitivity: 85dB/mW Waterproof Rating: IPX5