This heard in hearing aids 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 aid can perfect the ear. You can have a try. Audiological Features ● Low Equivalent Input Noise ● Super Clear Sound ● Low Frequency Cut Filter Functional Features ● integrated signal processing ● Volume Control Mode: Rotated VC 0~25Db ● Colors available：Red, Blue ● Type: Left-Blue, Right-Red ● Material: Silica Gel ● Battery Type: A10 Installation Steps: 1. Open the hearing aid battery compartment 2. Put the battery 3. Turn off the battery compartment and adjust the volume 4. Free debugging and ready to use Package Include: 1 Pair hearing amplifier 1 x wax guard and tool 1 x shockproof case 2 x batteries 1 x instructions 1 x cleaning brush 9 x earplugs Notes: 1. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures. 2. Please allow slight dimension difference due to different manual measurement.