Open-ear wearing, protect eardrums. Transmit sounds through bones, no hearing damages. Sweatproof,good for sport,feetness and driving etc.
Specification: Bluetooth chip: CSR8635 Bluetooth version: 5.0 Effective range: 10M Frequency range (Hz)﹕20HZ--20KHZ Impedance (ohm)﹕8Ω Receiving sensitivity (dB)﹕88dBm Battery: 180mAh Power battery Talking time(H)﹕6H Music time(H)﹕6H Standby time(H)﹕10 days Charging time(H)﹕2H USB port: MIC USB Product size﹕153*105*55mm Product weight﹕33g