1. Material: ABS
2. Function: hearing aid
3. Working time: 48 hours
4. Power supply mode: USB charging/built-in lithium battery
5. Battery capacity: 50mah

Features:
1. 16-channel digital chip, digital noise reduction, high-definition sound quality
2. 4 modes are adjustable, suitable for different hearing needs
3. Wear it invisibly, without losing face, and fixing the bracket, which cant be shaken off madly
4. Skin-friendly texture, soft and comfortable to wear
5.4 pairs of soft silicone ear caps

Four-speed mode:
1.1 file general program: smooth sound, use in general environment
2.2 file noise program: suitable for noisy conditions
3.3 low frequency program: low frequency loss, use by severe patients
4.4 high frequency program: high frequency loss, use by severe patients

Instructions for use:
1. Connect earplugs
2.USB charging
3. Wear a hearing aid
4. Boot mode