K-80 Adjustable Acousticon In Ear ITE Hearing Aids/Aid Audiphone Sound Amplifier. Features: 1.Light Small Sound Amplifier Adjustable Tone ITE Hearing Aid 2.When you see the film, watch the play, have meeting, or have classes, this product can help you to hear the sound clearly and loudly 3.Made of durable soft plastic material that comfortable 4.While in forest, if you want to hear very slight sound, it will be a good choice 5.It can be used for sound amplifier 6.Max sound output: 110±5dB 7.Sound gain: ≥30dB 8.Total Harmonic Wave Distortion: ≤10% 9.Frequency range: 300-4000Hz 10.Input noise: ≤40dB 11.Voltage: DC 1.5V 12.Current: ≤4mA How to use: * Before using switch the volume to the minimum position. * Put the ear hook on your ear, plug in the ear plug tightly. * Turn on the power and adjust the sound volume to get clear sound. * If you hear the whistling sound, please check whether you have plugged in the ear plug tightly. If it can’t be plugged tightly, please change the other size plug. * Remove the battery if you don't use it for long time. Package includes: 1 x Adjustable Volume Hearing Aid 2 x AG3 Button Battery 4 x Earplug (different size) 1 x Carrying Case 1 x User Manual 1st 2 photos of actual item. Remainder are stock photos