Rechargeable Sound Amplifier Noise Reduction Portable Adjustable Hearing Aids With Charging Base

Product performance and parameters 1 Max saturater volume output 130±5 dB 2 Max voice gain 55±5 dB3 Harmonic distortion 10 1000hz4 Equivalent input noise level 30dB 5 Frequency range 100 4000 Hz6 Battery 1 2V 7 Signal to Noise Ration 28db 8 Gain 30db 9 Distortion 6 10 Working Current 3MAProduct description 1 this product for charging do not need to buy batteries and trouble no electricity can charge 2 when please place the product directly inserted in the black box on the product without electricity Put the power into the DC jack charging the black box on the exhibit of lanterns lit 3 The charge 8 hours can be used 12 hours so you night after charged during the day don t worry he will not be without electricity 4 When used to choose the suitable for your earplugs and then switch to ON open state and then to turn the volume switch to your dB when you sleep or take a shower when you put him down will hit the OFF switch off state so can Ting long use time 5 do not place the product in water or moist places Packing materials QT 50PCS CTN N W 7Kg G W 8Kg SIZE 10 5 14 5 6cm