This hearing device is designed for old people or people with hearing problems. Low power consumption, high-fidelity material, quality chip, strong and practical. The shape of hearing device matched with the earcanal which ensures the comfort. User-oriented design make the hearing device can perfect the ear. You can have a try. Features: This hearing device is designed for old people or people with hearing problems. Its clearly sound quality and big power can be used for compensation of the hearing loss. Low power consumption, high-fidelity material, quality chip, strong and practical. The shape of hearing device matched with the earcanal which ensures the comfort. Soft silica gel material, does not harm to your ear, and also ensure stability and lasting. Full digital circuitry, low power consumption, adaptive noise reduction, adaptive feedback cancellation. Specifications: Name: Hearing Device Material: plastics Battery: 1 * built-in battery, 1.2V, 3mAh (included) Voltage: DC1.2V Rated working current: 2mA Frequency response: 450-3400MHz Max sound output: 1293dB Sound g-ain: 405dB Total harmonic-wave distortion: 10% Input noise: 32dB Charge time: 6 hours Working time: 48 hours Item weight: 8g / 0.28ounce Package size: 135 * 65 * 25mm / 5.31 * 2.56 * 0.98in Package weight: 70g / 2.47ounce Packing List: 1 * Hearing Device 3 * Replacement Earplug 1 * Brush 1 * USB Cable 1 * Guideline