Elenco K-23 Burglar Alarm Soldering Kit | Lead Free Solder | Great STEM Project | SOLDERING REQUIRED Hone your DIY soldering techniques on the Elenco Burglar Alarm Soldering Kit; Enjoy the pleasure of having assembled and soldered it yourself Use your completed Burglar Alarm to safeguard your stuff Surprise your little brother or sister with the burst of sound from this handy little DIY kit Includes: PCB, electronic components, and instructions PCB measures 492mmX445mmX16mm Add this kit to your STEM curriculum From the company that brings you Snap Circuits - 9 volt battery not included