Features: Bluetooth-compatible 5.1 Chip: Effectively solve the headset and Android connection instability, faster and more stable connection, and more compatible. 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. Intelligent Noise Reduction: Even when you are in a noisy environment, this headset allows you to talk clearly as if you were communicating face-to-face, without being affected by noise. Suitable for: It is suitable for every usage scenario, special car driver, courier, journey, etc. It is convenient and practical. 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: V5.1 Battery: 170MAH Endurance: 12 hours Charging Time: 2 hours Transmission Distance: 15m Frequency: 20Hz-20KHz Impedance: 32 Sensitivity: 85dB/mW Waterproof Rating: IPX5