• Attractive design, mini size, light weight

• Built-in lithium battery, the capacity is 110mAh

• It can work 25h after fully charged

• Sound gain of 50dB

• On/Off switch

• Volume control

• N-H switch 

• Different size noise prevention earplug

• Strict quality control, test by the hearing aid test machine of Fonix 7000 and Fonix 8000

Specification:

• Max Sound Output: 129±4dB

• Max Sound Gain: 50dB±5dB

• Harmonic Wave Distortion: ≤5%

• Frequency Range: 450~3500hz

• Input Noise: ≤30dB

• Battery: Lithium Battery

• Working Voltage: DC 3.7V

• Working Current: ≤4mA

• Main Unit Size: 46x27x16mm

• Net Weight: 12g