Mini size sound amplifier

●  Mini size sound amplifierÂ

●  Volume control

●  Battery door as ON/OFF switc

Max Sound Output:        ≥120 dB

Max Sound Gain:          ≥30 dB

Harmonic Wave Distortion: f<1000Hz≤10%,f>1000Hz≤4%

Frequency Range:          250～3800 Hz

Input Noise:               ≤50 dB

Battery:                   AG3        Working Voltage           dc1.5V           Working Current:          ≤4mA   Â