Awei T67 Earhook Earbuds.

Bluetooth version: V5.3 AD6973D4 (with power amplifier) Support protocol: A2DP HFP AVRCP Battery capacity: 65mAh Battery capacity of charging bin: 400mAh (with protective plate) Charging time 1.5h Talk time: 7.5H Playback time: 8.5H Standby time: 200H Horn parameters: Horn specification: 10 * 8.5 * 2mm square horn Sensitivity: 119 ± 2dB (800MV 1KHZ) Impedance: 30 Ω ± 15% Ohm, at 1KHz Output power: 21mW Microphone parameters Sensitivity: - 42dB ± 2 Impedance: 400 OHM