ITEM NAME:Axon Hearing Aids Small Mini Behind The Ear Best Sound Voice Amplifier Adju Q3G8 Axon Hearing Aids Small Mini Behind The Ear Best Sound Voice Amplifier Adju Q3G8 Super mini size and light weight, not easily to be seen Amplify sounds up to 40 decibels Convenient wear, Adjust to either ear The scope of application of gas conduction hearing disorders. Taboos otitis media or ear suppuration who are disabled. Maximum sound output: 130 Â ± 5dB Sound gain: more than 50dB Total harmonic distortion: less than 5% Frequency range: 300Hz ~ 40000Hz Input Noise: less than 30 dB Current: less than 4mA Battery Type: AG13 button cell battery (1pc included) Choose an earplug of slightly bigger size to avoid whistler Adjust volume to the minimum before wearing Increase volume gradually to avoid sudden increase in sound The battery installation: Gently open the battery compartment cover, put a AG13/LR44 battery into the battery compartment in the right direction, then close the battery compartment . Color: skin tone Material: ABS + silicone Package Content: 1* Hearing Aid 3* earplugs 1* AG13 battery 1* manual 1* hard box packaging.The scope of application of gas conduction hearing disorders. Convenient wear, Adjust to either ear. Super mini size and light weight, not easily to be seen. Input Noise: less than 30 dB. Color: skin tone.