1. Material: ABS
2. Hearing aid battery capacity: 40mAh
3. Charging compartment battery capacity: 300mAh
4. Hearing aid charging time: about 2-4H
5. Current: within 5mA
6. Frequency response range: 300-3600Hz
7. Weight of a single hearing aid: about 5.8 grams
8. Size of a single hearing aid: about 40x12x22mm

Features:
1. Intelligent noise reduction, high-definition sound quality, no interference, no delay, restore the real sound
2. Adjustable volume, easy to operate
3. Nano layer shell, waterproof and sweatproof
4. Silicone earplugs, good elasticity, soft and comfortable
5. 360 degree rotatable design, easy to wear
6. Delicate and compact, easy to carry