QUWN-Mini Hidden Sound Amplifier with 4 Channels Layered Noise Reduction and Adaptive Feedback Cancellation

Description

Max Sound Output: ≥120 dBMax Sound Gain: ≥30 dBHarmonic Wave Distortion: f<1000Hz≤10%,f>1000Hz≤4%Frequency Range: 250～3800 HzInput Noise: ≤50 dBBattery: AG3 Button battery （Not included）Working Voltage: dc1.5V Working Current: ≤4mAColor: As the picture showsItem Size: 1.9 x 1.4 x 1.6cm Net Weight:3gPackage included:1 * Hearing aid 4 * Earplug (different sizes)1 * User manual1 * Box