This BT Hearing amplifier is designed for old people or people with hearing problems, suitable for those people who was hearing lo or patients. The hearing amplifier can instantly turn into a BT headset and turn on the hands-free calling function with a single-tap. In addition, through BT, you can also connect stereo loudspeaker and other audio-visual equipment with BT function to deliver clear and fine quality audio. Features: It can be connected directly to a BT-enabled mobilephone. The hearing amplifier can instantly turn into a BT headset and turn on the hands-free calling function with a single-tap. In addition, you can also connect stereo loudspeaker and other audio-visual equipment with BT function to deliver clear and fine quality audio. When the calls come in, short pre the M mode button to answer/hang up the phone, long pre the M mode button for about 2 seconds to reject the connection. When playing music, short pre the M mode button to plays or pause the music. Low power consumption, high-fidelity material, fine quality chip, provides 4 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 earcanal simulator, will not feel pain even after long time wearing. Specifications: Name: Hearing Device Model: Z-360BT Color: fleshcolor, gold, blue, silver (optional) Battery: 1 * lithium battery, 3.7V, 2mAh (included) Max sound output: 129+3dB Full-range sound gain: 38±5dH Equivalent input noise: 29dB+3dB Frequency ranges: