Features: LM317 adjustable voltage regulator power board kit, including LM317 voltage regulator, PCB board, capacitors, resistors and other components. Rotate the potentiometer for adjustment,1.25-12V wide output. The voltmeter displays the output voltage for easy viewing and adjustment. Need capable of self-assembly, cultivating hands-on skills and creativity. Suitable for small circuit power supply in various DIY projects such as electronic enthusiasts' experimental teaching. Specifications: Material: PCB+ABS Type: with housing, without housing(optional) Power: 110V, 220V(optional) Plug: refer pictures to selection please Circuit board size: approx. 98x62mm/3.85x2.44inch Name: Adjustable Regulated Voltage Power Board Set Power: 2W Output: 1.25V-12V Current: when output is 5v, current is about 200mA Package Includes: 1Pc LM317 Adjustable Voltage Regulation Power Board Kit note: Loose parts shipment, you need to welding and assemble them yourself! Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.