MODEL NUMBER：HA-01
◎Batteries：Lithium polymer battery
◎Capacity:450mAh
◎Max Sound Output:110dB
◎Max Sound Gain:≥40dB
◎Freauency Range:300-4200HZ
◎weight:
◎Size:75*33.5*18.5mm
◎Working temperature:Hearing-aid
◎Working temperature:Hearing-aid