This air-conduction type hearing amplifier is designed for old people or people with hearing problems, suitable for those people who was hearing lo or patients. Low power consumption, high-fidelity material, fine quality chip, with stereo sound quality. Two operation modes design, N-normal mode and H-noise reduction mode, easy to adjust according different environment. You can have a try. Features: Low power consumption, high-fidelity material, fine quality chip, with stereo sound quality. Soft silicone material, will not harm your ear, and also ensure stability and lasting. Two operation modes design, N-normal mode and H-noise reduction mode, easy to adjust according different environment. This affordable hearing device have volumes controls, you can adjust the volumes to fit your own needs and preferences. It also has a noise reduction feature that helps the user hear with maximum clarity. Ergonomic design earcanal simulator, will not feel pain even after long time wearing. Easy carrying, more beautiful, easy to wear. Left ear or right ear optional, you can choose according to your needs. Specifications: Name: Hearing Device Type: left ear, right ear (optional) Battery: 1 * 13A battery (not included) OSPL90: Max 1153dB OSPL90 HFA: 1124dB FOG50: Max 323dB FOG50 HFA: 253dB Total harmonic-waves distortion: 3% Frequency ranges: 700-4500MHz Input noise: 32dB Voltage: DC1.4V Current: 1.5mAh Package size: 80 * 80 * 20mm / 3.15 * 3.15 * 0.79in Package weight: 60g / 2.12ounce Packing List: 1 * Hearing Device 6 * Earplug 1 * Cleaning Brush 1 * Manual