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
