Discreet motion-activated transmitter alerts you to any car or person passing through the surveillance area of your driveway or threshold.  Other uses include: 1) placing the unit in a location such as outside a front door where, if a child should exit the house or if a visitor should arrive, the chime will sound, or 2) at the entrance to a business to alert you to the entrance of a customer.

• Wireless technology allows transmitter to be placed up to 400 feet away from receiver
• Uses Passive Infra-Red (PIR) to detect motion
• Transmitter measures 4.5 inches x 2.5 inches x 2.5 inches
• Transmitter requires three (3) C batteries or a 4.5 volt adapter (not included)
• Receiver measures 4.75 inches x 3.5 inches x 1.5 inches
• Receiver requires one (1) 9 volt battery (not included)