This hearing device 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, fine quality chip, invisibility fleshcolor surface will not incongruity in the crowd. User-oriented design make the hearing amplifier can perfect the ear. You can have a try. Features: This heard in hearing amplifier is designed for old people or people with hearing problems, suitable for those people who was hearing loss or patients. User-oriented design make the hearing amplifier can perfect the ear. Low power consumption, high-fidelity, fine quality chip, with soft silica gel, does not harm to your ear. This affordable hearing amplifier have volumes control, can adjust the volumes to fit your own needs and preferences. Powered by built-in battery, smaller, simpler, more convenient, more powerful and more stable. Use digit circuit, automatic noise dropping technology, natural sound, provides you a comfortable experience. Ergonomic earplugs design, will not feel pain even after long time wearing. Note: To avoids being swallowed by children by accident, keep small parts out of children's reach. Specifications: Name: Hearing Amplifier Material: plastics Color: black, fleshcolor (optional) Battery: 2 * A10 battery, 1.4V, 1.2mA (included) Max sound out put: 122±3dB Sound gain: ≥28dB±2dB Total harmonic-wave distortion: ≤3% Frequency-range: 300-4800MHz Input noise: ≤26dB Package size: 135 * 65 * 25mm / 5.31 * 2.56 * 0.98in Package weight: 55g / 1.94ounce Packing List: 2 * Hearing Amplifier 6 * Earplug 2 * A10 Battery 1 * Vent Rod 1 * Guideline