Elenco Practical Soldering Project Kit - Teaches Basics of Working with Printed Circuit Boards (SP-1A)This solder practice project will help you achieve good soldering techniques, become familiar with a variety of electronic components, and gain valuable experience working with printed circuit boards Includes all necessary components, along with an illustrated assembly manual to build a multivibrator circuit that produces a fun two tone European siren sound while two LEDs flash alternately Made in the United States Note: Requires one 9V battery (not