Check the listing for details. Police Siren Beginner Soldering Practice Kit with LEDs and Speaker. Condition: New. Listed at 12.99 USD. NOTE: This kit requires assembly with a soldering iron. Soldering iron and solder are not included. This solder practice board is designed to teach tech enthusiasts, beginner students, and hobbyist to learn the basics of good soldering techniques. The soldering kit contains a variety of component parts, including resistors, diodes, integrated circuits (ICs), and capacitors, that can be soldered to the printed circuit board (PCB) to practice soldering. Once the soldering techniques are learned, the main portion of the PCB and its component parts can be soldered to the board. The main PCB circuit is a police siren. When the switch is in the ON position, you will hear the shrill of a siren while the green and red LEDs will blink on and off simultaneously. Test your work by using a 9V battery (not included). Board dimensions: 3.75 x 2.00