Maximum sound output: 114 ± 3dB
High-frequency average OSPL90：108±4dbB
Maximum sound gain: 35dB ± 5dB
Total harmonic distortion：≤8%
Frequency range: 200Hz-5000
Equivalent input noise level：≤19dB
Working current≤2mA

1, USB charging, DC 2.0 cable

2, Support Bluetooth 5.0, with TWS mode.

3, DSP digital chips, intelligent noise reduction.

4, Working time: Hearing aids mode is 12-15 hours. Bluetooth mode is 4-5 hours.

5, Charging time:2 hours.

6, M key for switch BT and hearing aid mode, also for charging indicator light

7, don’t have left and right side ear limit to wearing.