Small brilliant LED flasher alternately flashes one red and one blue LED. Uses SMD (surface mount device) components so there are no holes in the PC board (all components mount to the small foil pads on top of PC board). SMD is the most common technology in use today and this kit provides a nice introduction for your students. Operates on one 9V battery (not included). Size of PC board 1.6" x 1.1". Complete with all parts, PC board and instructions. Skill level 2. Manufactured by Chaney Electronics.