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, provides 2 colors for you to choose. This affordable hearing device have volumes control function, and noise reduction function Features that helps the user hear with maximum clarity. You can have a try. Features: Stylish and modern design, make you feel confident while boosting your hearing. Low power consumption, high-fidelity material, fine quality chip, provides 2 colors for you to choose. Soft silicone material, will not harm your ear, and also ensure stability and lasting. 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, your ears will not feel pain even after long time wearing. Comes with 3pcs handy earplug in different sizes for you to customize comfort, you can try the different earplug sizes to find your perfect fit. Comes with one recharging box, just automatic recharge when putting hearing devices into the recharging base, and also easy to take out and carry around with you. You can use USB cable to recharge the recharging base, which makes you no longer to buy and replace the batteries inside often, save time and money. Specifications: Name: Hearing Device Model: JH-A39 Color: black, white (optional) Battery: Recharging box: 1 * 4.2V, 40mah battery (included) Hearing amplifiers: 2 * 1.2V, 10mAh battery (included) Maximum OSPL90: 117dB3dB FOG50 max gains: 35+5dB EQ input noise: 29+3dB Frequency ranges: 400Hz-4500Hz Working current: 6mA Total harmonic distortion: 7% Item size: 60 * 42 * 28mm / 2.36 * 1.65 * 1.10in Item weight: 63g / 2.22ounce Package size: 120 * 92 * 50mm / 4.72 * 3.62 * 1.97in Package weight: 127g / 4.48ounce Packing List: 2 * Hearing Device 6 * Earplugs 1 * Recharging Base 1 * Cleaning Brush 1 * USB Cable 1 * Manual