Features:
<br />1. Plug and play, no drive needed.
<br />2. Built-in rechargeable lithium battery with 200mAH capacity using time up to 20 hours.
<br />3. Higher thrust and better sense of hearing.
<br />4. Small and portable, use at anytime & anywhere.
<br />5.  It is specially designed for mobile phones, but also can be used to car audio, outdoor speaker and so on.
<br />
<br />Description:
<br />Use time: 20 hours
<br />Charging time: 1 hours
<br />Power supply mode: built in 200nAh lithium battery
<br />Charging mode: USB micro charging
<br />Input voltage: DC 5V
<br />Frequency response: 2-27KHz
<br />Signal to noise ratio: 95dB
<br />Color: black, brown (optional)
<br />Material: aluminum alloy shell
<br />Product size: 5.5*2.3*1cm
<br />
<br />Packing list: 
<br />1Pcs x 3.5mm headphone stereo amplifier<p> <b><b><img src="https://contestimg.wish.com/api/webimage/59f98a6a20bb64452d208759-large.jpg"><img src="https://contestimg.wish.com/api/webimage/59f98a6a20bb64452d208759-1-large.jpg"><img src="https://contestimg.wish.com/api/webimage/59f98a6a20bb64452d208759-2-large.jpg"><img src="https://contestimg.wish.com/api/webimage/59f98a6a20bb64452d208759-3-large.jpg"><img src="https://contestimg.wish.com/api/webimage/59f98a6a20bb64452d208759-4-large.jpg"><img src="https://contestimg.wish.com/api/webimage/59f98a6a20bb64452d208759-5-large.jpg"><img src="https://contestimg.wish.com/api/webimage/59f98a6a20bb64452d208759-6-large.jpg"><img src="https://contestimg.wish.com/api/webimage/59f98a6a20bb64452d208759-7-large.jpg"><img src="https://contestimg.wish.com/api/webimage/59f98a6a20bb64452d208759-8-large.jpg"><img src="https://contestimg.wish.com/api/webimage/59f98a6a20bb64452d208759-9-large.jpg></b></b></p>