Item Type: Ear Care
<br />Material: Medical plastic
<br />Size: 4.1*2.3*1.1cm
<br />Max.saturater volume output: 135±5dB
<br />Max voice gain: 55±5 dB
<br />Equivalent input noise level:  30 dB
<br />voltage of battery : DC 1.5V( The AG13 button battery a grain)
<br />Harmonic distortion:  10% (1000hz)
<br />Frequency range: 300-4500 Hz
<br />directivity: omni-directional
<br />weight of machine: 13g<p> <b><b><img src="https://contestimg.wish.com/api/webimage/58d743a0e2e84b54d2642fb0-large.jpg" noproxy><img src="https://contestimg.wish.com/api/webimage/58d743a0e2e84b54d2642fb0-1-large.jpg" noproxy><img src="https://contestimg.wish.com/api/webimage/58d743a0e2e84b54d2642fb0-2-large.jpg"><img src="https://contestimg.wish.com/api/webimage/58d743a0e2e84b54d2642fb0-3-large.jpg></b></b></p>