2 x Small Hearing Aids Aid In Ear Invisible Best Sound Amplifier Adjustable Tone Features : 100% brand new and high quality Light Small Sound Amplifier Adjustable Tone ITE Hearing Aid 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 Made of durable soft plastic material that comfortable While in forest, if you want to hear very slight sound, it will be a good choice It can be used for sound amplifier Max sound output: 110±5dB Sound gain: ≥30dB Total Harmonic Wave Distortion: ≤10% Frequency range: 300-4000Hz Input noise: ≤40dB Voltage: DC 1.5V Current: ≤4mA Important Note : It is forbidden to used by those patients with tympanitis or ear pyogenesis. Dont use it at high volume for long time. Otherwise it will injure your ear If you feel uncomfortable, please stop using Please maintain the products all the time, avoid ear plug and sound collecting hole being blocked by foreign objects. It will affect the effect of sound amplifier Avoid shocking, falling the product. Dont keep or use it in environment of humid or high temperature Dont throw the scrapped battery as common rubbish, it should be handled by special equipment Please take out the battery if dont use it for a long time. Otherwise the components will be rotted by time. Rotten liquid from battery Dont use the product in potential explosive or dangerous environment Keep the unit away from the children. It will injure him or others, or damage the unit Powered by AG3 or A312 zinc air battery Dimensions: app.1.9 x 1.4 x 1.5 cm Color: As the pictures show Package includes : 1 x Adjustable Tone Hearing Aid Sound Amplifier 2 x AG3 Button Cell Battery 4 x Earplug 1 x Carrying Case 1 x User Manual Note : No retail package to save the cost and protect environment.