This is the LED Sequencer #1 Kit. This is a neat circuit that lights up 10 LEDs in sequence. There are a bunch of youtube videos out there showing this same circuit. The circuit includes an adjustment for speeding up or slowing down the LEDs. Use this in a bunch of different places.You can remote the LEDs to get your own special effects. Try putting in different colors of LEDs for even greater effects. This kit will come with a set of 10 LEDs.This kit is also offered with a Built & Tested option for those that do not want to build the kit themselves.The PCB is double-sided plated thru-hole 1.50 long x 3.00 wide made of .062 FR-4 epoxy glass. It has green Solder Mask (LPI) on both sides with white Silk Screen on the Top side. It includes 4 mounting holes. This kit does not include the tools you will need to assemble the circuit. You will need tools such as a soldering iron solder wire cutters etc.