Here you have it! This is the ultimate blinker kit! It not only blinks three powerful clear LEDs for months when powered by two “AA” alkaline batteries, but also includes an 8 position DIP switch that turns the kit on and off and adjusts the speed of operation. Seven different blinking speeds can be achieved by changing the settings on the DIP switch. Approximate blinking speeds vary between 10 to 60 flashes per minute. This kit is ideal to put in the front or rear of your bike when biking at night. Hangit on your clothes or hat when jogging or for Halloween. It also is great to put inside your car or by your window at home for a fake alarm system. We are sure you will find many other applications. Approximate size of board: 4" (base) x 2 3/4" x 2 3/4".Operates from 2 AA batteries (not included). Complete with all parts, PC board and instructions. Skill Level 1.