

This device will easily scare off anyone who tries to invade your desk, dresser, file cabinet, lunch box, etc. Once the arming switch is turned to "on", you have just a few seconds to put the Secret Alarm in the desired place and close it up. The next time someone opens it, a loud noise will come from the horn until it is reset. The alarm uses light-sensitive CDS and SCR circuits. It stays quiet in the dark but when light hits the sensor, the horn activates. Designed for beginners, this kit requires soldering components to the PC board.
Size: 3.75" x 2.25"
Includes
parts
PC board
instructions
Requires 9V battery, sold separately.