1. Behind the ear hearing aid
2. Volume adjustable
3. Powered by 1 x AG3 battery (included)
4. Silicone earplugs in 3 different sizes, fit most ears
5. Help people with hearing impairment to hear sound and voice

Technical parameters:
1. Sound output: 110+/-5dB
2. Sound gain: Greater than or equal to 30dB
3. Total Harmonic wave distortion: Less than or equal to 10%
4. Equiv Input Noise: Less than or equal to32dB
5. Frequency range: 300Hz~4000Hz
6. Voltage:1.5V(AA)
7. Current: Less than or equal to 4mA