This is a DIY kit which needs to weld each component together by yourself.It can input for DC/AC power,but only can output forDC.Features:1.Excellent connectors. Two inputs and three outputs (a main and two auxiliary outputs)make it more convenient to operate when the main output is connected to the Banana jack.2.Adding a transistor to support load for protection. Even the regulated power supply can be adjusted by LM317T,the load will be burned with the poor contact of potentiometer.Then a transistor can play an important role to support the load for protection at this time.3.With the dimensions of 30*25*30mm, the heat sink provides LM317T with enough area of dissipation.4. PCB four corners with studs plus nut fixing, making installation easier, place more stable.5.Brand new original suite and A level PCB with the thickness of 1.2mm. Pad with solder coating makes the welding much more easier.Specifications:PCB size: 69 * 50mmFor dc input:5-35VAC input:6-25VFor dc output:1.3-30VMaximum current: 1AMinimum differential pressure: 3VPacking Include: 1 set LM317 adjustable adjustable power supply module module board DIY kit parts