Standard Features
Attractive design, small and light.
Less noise, fine fidelity and tone.
With volume adjustment switch.
With ON/OFF switch.
Tested according to International Standard IEC118-7.
Max Sound Output: 128dB
Sound Gain: >38dB
Total Harmonic Wave Distortion: <10%
Frequency Range: 400----4500Hz
Equivalent Input Noise Level : <30dB
Input Noise: <30dB
Voltage: 1.5V
Current: 3mA
Battery: A675 /AG13 Button Cell
Estimated Battery Life: Over 100 hours /35 hours
Max Sound Output: 125dB
Current: <3mA
Battery: with A675 Zinc-Air /AG13 Button Cell
Middle Output.
Attractive design.
Ultra-light Weight.
With imported microphone and receiver.
Sound Gain: >43dB
Total Harmonic Wave Distortion: <8%
Frequency Range: 400----6200Hz
Input Noise: <28dB
Battery: A675 / AG13 Button Cell
Estimated Battery Life: Over 100 hours (with A675 Zinc-Air)
Sound Gain: >50dB
Current: <4mA
Battery: A675 /AG13
Estimated Battery Life: Over 100 hours
Max Sound Output: 129dB
Sound Gain: >45dB
Frequency Range: 350----4500Hz
Voltage: 1.5V /1.3 V
Estimated Battery Life: 35 hours
With N-O switch.
Frequency Range: 450----3500Hz
With M-T switch.
Frequency Range: 450----4500Hz
Total Harmonic Wave Distortion: <5%
Frequency Range: 350----3500Hz
Voltage: 1.5V/1.3V
Battery: A675 Zinc-Air/ AG13 Button Cell
Voltage: 3.7V
Current: 4mA