This hearing amplifier is designed for old people or people with hearing problems, suitable for those people who was hearing loss or patients. Low power consumption, high-fidelity material, fine quality chip, support receiving sound source, and support continuous filtering of different wave frequencies. You can have a try. Features: Low power consumption, high-fidelity material, fine quality chip, support receiving sound source, and support continuous filtering of different wave frequencies. Soft silicone material, which is no harm to your ear, and also ensure stability and lasting. 360° rotation design, suitable for both left ear and right ear. This affordable hearing device have volumes control, 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. USB recharging design, which makes you no longer to buy and replace the batteries inside often, save time and memory. Specifications: Name: Hearing Device Model: Z-27 Color: blue, silver (optional) Battery: 1 * lithium battery, 1.2V, 40mAh (included) Max sound output: 125±3dB Sound gains: ≥32±5dB Total harmonic-waves distortion: ≤10% Frequency ranges: 450Hz-4500Hz Input noise: ≤32dB Voltage: DC1.2V Current: ≤1.2mA Package size: 165 * 65 * 30mm / 6.50 * 2.56 * 1.18in Package weight: 115g / 4.06ounce Packing List: 1 * Hearing Device 6 * Earplug 1 * Cleaning Brush 1 * USB Cable 1 * Recharging Base 1 * Manual