Model LK288 RECHARGEABLE TYPE

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. 
Specification:
 Max Sound Output: 128±5dB
 Sound Gain: ≥38dB
 Total Harmonic Wave Distortion: ≤10%
 Frequency Range: 400----4500Hz
 Input Noise: ≤30dB
 Voltage: 1.5V
 Current: 10.8mA
 Battery: AG13 Button Cell
 Estimated Battery Life: 35 hours