kibvoe Hearing Amplifier Aid Adults & Seniors Rechargeable Receiver-in-Canal. Specifications Model: EN-T201D open fit Maximum saturated sound pressure level: ≤130dB+3dB Average saturated sound pressure (OSPL90): 123dB+4dB Maximum gain: 50dB±5dB Average gain: 42dB±5dB Equivalent input noise level: ≤29dB±3dB Frequency response range: 300Hz~4500Hz Total harmonic distortion: ≤5% Net Weight: 4g /0.009lb Battery: 30mAh Li-polymer battery Rated current: ≤5mA Overall size: 3.5*1.3*0.8cm/1.4*0.8*0.3inch
eBay