This product enhances sound energy intensity and forwards to earsundistortionly through internal circuit. It need to change sound energy toelectrical signal, enlarge the electrical signal,then change the electricalsignal to sound energy. Input transducer is made of microphone,magneticinduction loop and so on,whose function is changing the sound energy toelectrical signal,then send to amplifier.The amplifier enlarges the inputelectrical signal,then send to the output transducer.The output transducer ismade of earphone or bone conduction vibrator,whose function is changing theenlarged electrical signal to sound energy or kinetic energy to output,to fitfor deaf patient in various degrees. Specifications: Max sound output: 110±5dB Sound gain: ≥30dB Total harmonic wave distortion: ≤10% Frequency range: 300-4000Hz Input noise: ≤40dB Battery Required: 1 x AG3 Button Cells(NOT included) Voltage: DC 1.5V Current: ≤4mA Voltage: DC 1.5 Net weight: 48g Package includes: 1 * Hearing Aid (with one earplug) 1 * Carrying Case 3 * Silicone Adjustable Tips 1 * Brush
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