Mini Hearing Aid Digital Wireless Inner Ear Sound Amplifier Deaf Assistance Ear Care Features: 1. Easily fit your ear, in-ear earmuff for comfortable wearing experience, release your ears. 2. Can help you attain clear and smooth sound, which provides you more convenience in daily life. 3. You can hear clear and natural sound, no embarrassing, no shame when seeing and visiting your relatives, friends. 4. This hearing aid is specially designed for the hearing losing people. Wearing it, you can discover the pleasure of gathering with friends and family, feeling more confident at work and enjoying movies, music and TV programs. 5. Provides superior sound quality with low distortion, you can enjoy more sonorous and clearer voice. Specification:  Item Type: Hearing Aid Material: ABS Maximum Voice Output: 130db+5db Maximum Sound Increase: 50dB±5dB Wave Distortion: ≤5% Frequency Range: 300-4000Hz Input Noise: 30dB Battery: 1 x AA Battery (Not Included) Working Voltage: DC 1.5V Working Current: ≤4mA Package List:  1 x Hearing Aid Earphone 1 x Hearing Aid Host Machine 4 x Earplug (Differnent size) 1 x Instruction Note: 1. Keep the volume to a minimum before wearing. 2. Choose slightly larger earplugs to avoid whistling. 3. Gradually increase the volume to avoid sudden loud sounds. 4. If you hear whistling, check that the earplugs (silicone) fit.