Fangrui Product Details Output Voltage:can Be Set To 5v/8v/9v/12v, Default Is 12v Input Voltage Range:2.5v-5v, Input Voltage Must Be Lower Than The Set Output Voltage Type:voltage Regulator Model Number:mini Dc Boost Converter Board Output Capacity:5v 1a, 8v 0.5a, 9v 0.45a, 12v 0.3a When Using 3.7v Lithium Battery Input Using 5v Input:8v 0.7a, 9v 0.7a, 12v 0.5a Can Be Output Default Output 12v:led Indicator Consumes About 1ma. Tip:if The Indicator Light Is Off, The Input Current Is Less Than 1ma At No Load Voltage Setting: The Front Of The Pcb Can Be Seen Marked With The Characters A,b. The Output Voltage Can Be Changed By Changing The Pads Next To The Characters Using A Soldering Iron, 0 In The Table Below Means That The Pads Are Disconnected, 1 Means That The Welding Is Connected; The Pad Next To The Led Indicator Can Also Be Disconnected To Turn Off The Indicator. Colour:black Material:pcb+electronic Components Package Contents: 20 * Mini Dc Boost Converter Board Only The Above Package Content, Other Products Are Not Incl