Dieters movement alarm is a simple but effective set to build an alarm that reacts when moved. Placed in your rucksack or gym bag it will keep all thieves at bay. As soon as a light movement is made, the alarm starts to sound. It contents alarm beeper, switch, battery clip, wire, capacitor, resistors, collet, grommet, shrink tubing, nuts and bolts and wire end ferrules. Introduction to the principles of electronics. It is recommended for 10 years old kids.