GM-105 Elderly Hearing Aid Sound Amplifier Intelligent Noise Reduction Sound Collector, Style: EU Plug 1. Material: ABS 2. Function: hearing aid 3. Size: about 45x40x10mm 4. Frequency response range: 400-3800HZ 5. Battery capacity: 60mah 6. Weight: about 6.5g 7. Charging current: DC 5V0.05-1A 8. Power supply mode: USB chargingbuilt-in lithium battery Features: 1. Adaptive, intelligent noise reduction, high-definition sound quality 2. Intelligent adjustment, no ear-piercing, intelligent audio processing, no damage to eardrum 3. Cycle charging, long-lasting battery life 4. Wear firmly, not easy to fall 5. Medical grade silicone, ergonomic design, comfortable to wear 6. The product can be worn on both ears regardless of left or right 7. Small and convenient, not tired for a long time 8. The operation is simple, you can get started right away Packing list: Hearing aid x 1 Storage box x 1 Charging head x 1 Charging cable x 1 Manual x 1