Sell 【Ready Stock】☌[Hi-tech] AXON F-138 Mini Volume Adjustable Invisible Sound Amplifier Hearing Aid best price

Description: high quality hearing aid sound amplifier Behind Ear style Hearing Aid sound voice amplifier audiphones Adjust volume to the minimum before wearing,Increase volume gradually to avoid sudden increase in sound Filter out unwanted noise caused by airflow or wind Deliver direct,and smooth sound right into your ear ,also provide improved technology for reduced electromagnetic interference Convenient for watching movie, enjoying the drama, attending meeting, or having class, it could help you hear the sound clearly and loudly Specification: Max Saturated Sound Pressure: 130dB+5dB Sound gain: ≥ 50db Harmonic Wave Distortion:≤ 5% Frequency response Range: 300--- 4000 Hz Input Noise: ≤ 30 dB Power Voltage :1.5 V Working Current : ≤4mA Battery Type: AG13 button cell Item Size: 40 x 45 x 10mm Package Includes: 1 Piece F-138 Hearing Aids 2 Pieces AG3 Button Cells 1 Piece Instruction Manual 1 Piece Case 3 Pieces earplug of different size