The Telespy Intruder Alert is a clever and reliable combination of a telephone, a motion sensor, and a microphone. The telespy is an ordinary telephone that doubles as a monitoring system. You simply enter any phone number you want the unit to call and turn the motion sensor switch to on. If motion is detected the phone well dial the number entered and upon answering you will be able to listen in by the amplified microphone on the unit. The telespy allows you to decide from a safe location if it is a friend or foe before you call the police. The listing period is about 30 seconds long, then the telespy disconnections and instantly rearms to detect again and again. Telespy operates from any phone line, requires no installation and is completely portable. There are no monitoring fees and no false arms.