Specifications:
Max Sound Output:127dB ± 4dB
Max Sound Gain:48dB ± 5dB
Total Harmonic Distortion:4%
Frequency Range:450~3500 hz
Equiv Input Noise:30 dB
Battery:AG5 Button Battery or A13 (Zinc Air Battery)
Working Voltage:DC 1.5V
Working Current:3mA
Measurement:4.6*3.8*0.9 cm
Package included:
1 x hearing aid amplifier
4 x earplug (different size)
2 x AG5 button cell battery
1 x manual
1 x case