Features: Specs for bone conduction earphone: Bluetooth chip: CSR8635 Bluetooth version: 5.0 Effective range: 10M Frequency range (Hz)﹕20HZ--20KHZ Impedance (ohm)﹕8Ω Receiving sensitivity (dB)﹕88dBm Battery: 200mAh 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﹕139*104*60mm Product weight﹕36g
Specs for hearing aid transmitter(sound amplifier) Bluetooth version: 5.0 Emission sensitivity: 2dB Charging voltage: DC5V Transmission distance: ≥ 10m SNR: 95dB Mic sensitivity: - 40 ± 3dB omnidirectional Talk time: 8-10 hours Music time: 8-10 hours