• Products technical parameter:Maximum saturated sound pressure level (dB): ≤ 130dB + 5dBMax Gain: 50+5dBEquivalent input noise: ≤32dBTotal harmonic distortion: ≤ 5%Frequency response range: 450Hz ~ 3500HzRated power supply current: ≤3mA

• Descriptions:Easy to hide and comfortably wear, This hearing device is unmatched in comfort and style.It is designed to be stylish and easily blend in with your body.Our device is comfortable in either ear, and comes with 3 different sized domes to fit different sized ears.This hearing amplifier comes with an excellent built-in digital noise reduction controller, allowing you to hear the person next to you with ease even in a noisy room.Help people with hearing impairment to hear sound and voice. Package included:1 x s-135 Hearing aid3 x Earplug (different sizes)1 x A675 button cell battery1 x User manual