Technical Parameters:
Max Out: 130dB ± 4dB　
Max Gain: 56dB ± 5dB
Harmonic Distortion: ≤10%
Frequency Range: 300Hz～4000Hz
Equvi Input Noise: ≤32dB
Stanard battery: AA batteries,No 5
Voltage: D.C. 1.5V
Current: ≤6.5mA

Features:
1.Medium power suitable for moderate to severe hearing weak people.
2.Stable quality,simple operation,easy to use
3.Low distortion,low noise
4.take phone file function

Specification:
H--High sound clear
T--Answer the phone
N--normal frequency
0-9: Small-Lound
ON-turn on
OFF-turn off
Product Weight: 28g
Product Size: 6.5*4.3*1.8cm
Package: Paper+Plastic Box
Package Size: 12*8.6*3.2cm
Carton Quantity: 120PCS
Carton Size: 52.5*31*39cm
GW: 12Kg
NW: 10Kg