JUMBO 2LED FLASHER Electronic Circuit Kit for Decorate & Christmas : FA175 A basic blinking light circuit that suits those who are interested in electronics. Easy to assemble and to understand with few components and low cost. 2 LEDs will alternatively blink and blinking speed is adjustable. Power supply: 3 VDC. Consumption: 14 mA. Max Adjust blinking speed with trimmer potentiometer. PCB dimensions: 1.39 x 1.27 inch. See more info via last picture (circuit diagram)