hearing aid
1. Maximum saturation sound pressure ≥ 110dB ± 5dB pole
2. full block sound gain: ≥ 30dB
3.The average gain: ≥ 40dB
4.Equivalent noise: ≤ 40dB.
5.Frequency Response: 300Hz-4000Hz
Standard battery: AG3 button batteries
Operating voltage: DC1.5V
Operating Current: ≤ 4mA
Product weight: 3g
Product size: 2 * 1.9 * 1.5cm
Package: paper + plastic box
Package size: 11.1 * 8.4 * 3.3cm
QTY: 120PCS
Carton Size: 52.5 * 31 * 39cm
GW: 11kg
NW: 9kg