EN-1200Pro

Max O 90：≤112dB+3dB
HFA O 90：108±4dB
Maximum Sound Gain：<40dB
Average Sound Gain：27dB±5dB
Equivalent input Noise：<32dB
Frequency Range：F1≤250Hz,F2≥5000HZ
Total Harmonic Wave Distortion：≤5%
Battery: A10 zinc-air battery