Mini Adjustable Bluetooth Hearing Aid for Seniors, Tone Sound Amplifier, Portable USB Rechargeable Hearing Amplifier (Blue) Function: 1. USB Rechargeable. 2. Switchable between 3 frequency modes. 3. Four levels of volume adjustment. 4. Imported chips with intelligent noise reduction. 5. Earmuffs are made of medical-grade TPE soft silicone, and the ear hooks are designed with a humanized arc for comfortable, pain-free long-term wear. 6. A single charge provides 60-70 hours of use, offering long battery life. 7. Can be worn on either the left or right ear. 8. This model features Bluetooth functionality. Specification: Product Name: Rechargeable BTE Hearing Aid Color: Skin/Blue (with charging head: European standard and American standard) (according to required charging head) Charger: DC 5V150mA~1A Weight: 220g (with packaging) Dimensions: 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): 120±4db Full Frequency Sound Gain (High Frequency Average): 38±5db Frequency Response Range: Not less than 500Hz~3200Hz Total Harmonic Distortion: Maximum actual measured value should not exceed 8% Equivalent Input Sound Level: Actual measured value should be ≤32dB Rated power consumption: Should be ≤2mA Tips: 1. Lower the volume to the minimum before wearing. 2. Choose slightly larger earplugs to avoid whistling. 3. Gradually increase the volume to avoid sudden sound increases. 4. If you hear a whistling sound, check if your ear (silicone) fits properly and the plug size creates a tight seal. Proper selection and fitting of earplugs ensure airtightness. 5. Keep earplugs clean. Package Includes: 1 x Hearing Aid 4 x Earplugs (different sizes) 1 x User Manual 1 x Storage Box 1 x USB Charging Cable with Charging Head