Mini adjustable bluetooth hearing aid for the elderly device tone sound amplifier portable usb rechargeable hearing amplifier(Skin(us Wb)blueteeth) The product is shipped based on the color or size of the main image of the product page. Colour:Skin(us wb)blueteeth Feature: 1. It can be charged via USB. 2. Switch between 3 frequency modes. 3. Four levels of volume adjustment. 4. Imported chips, intelligent noise reduction. 5. The earmuffs are made of medical TPE soft silicone, and the ear hooks are designed with a humanized arc, which is comfortable and painless to wear for a long time. 6. One charge can be used for 60-70 hours, and the battery life is long. 7. It should be worn regardless of whether it is worn left or right. 8. This model has a model with Bluetooth function. Specification: Product name: Rechargeable BTE hearing aid Color: skin/blue (with charger head: European standard and American standard) (according to the required charging head) Charger: DC 5V150mA~1A Weight: 220g(with package) Size: 15x40x10mm Maximum output: 129 + 4dB Maximum gain: 38±5dB Total harmonic distortion: ≤5% Equivalent input noise: ≤28 Maximum saturated sound pressure level ≤129+ 3db Output sound pressure level (high frequency average value) 120±4db Full frequency sound gain (high frequency average value) 38±5db Frequency response range: not less than 500Hz~3200Hz Total harmonic distortion: the maximum actual measured value should not exceed 8% Equivalent input noise level: the actual measured value should be ≤32dB Rated power supply current consumption: should be ≤2mA Tips: 1. Please turn down the volume to the minimum before wearing. 2. Choose slightly larger earplugs and avoid whistling. 3. Gradually increase the volume to avoid sudden increase in sound. 4. If you hear howling, please check whether your ears (silicone) are suitable and the size of the plug is tight, Correct selection and plugging of earplugs can ensure air tightness. 5. Keep the earplugs clean. Package Included: 1 x hearing aid 4 earplugs (different sizes) 1 x user manual 1 x storage box 1 x USB charging cable with charging head