1. and high quality
<br />2.stable performance
<br />3.change the resistance value can change the output voltage range, precision control
<br />4.for the use of pre-amp,headphone amp etc.
<br />5.output  dc±1.25-37v adjustable 
<br />
<br />note: this is a diy kit, all the parts need solder by yourself. 
<br />
<br />package included:   
<br />1x lm317 lm337 power suppluy kit  <p> <b><b><img src="https://contestimg.wish.com/api/webimage/589d861a72c76334a4fdc39e-large.jpg" noproxy><img src="https://contestimg.wish.com/api/webimage/589d861a72c76334a4fdc39e-1-large.jpg" noproxy><img src="https://contestimg.wish.com/api/webimage/589d861a72c76334a4fdc39e-2-large.jpg" noproxy><img src="https://contestimg.wish.com/api/webimage/589d861a72c76334a4fdc39e-3-large.jpg" noproxy><img src="https://contestimg.wish.com/api/webimage/589d861a72c76334a4fdc39e-4-large.jpg" noproxy><img src="https://contestimg.wish.com/api/webimage/589d861a72c76334a4fdc39e-5-large.jpg" noproxy><img src="https://contestimg.wish.com/api/webimage/589d861a72c76334a4fdc39e-6-large.jpg" noproxy><img src="https://contestimg.wish.com/api/webimage/589d861a72c76334a4fdc39e-7-large.jpg" noproxy><img src="https://contestimg.wish.com/api/webimage/589d861a72c76334a4fdc39e-8-large.jpg></b></b></p>