Driveway Parking Patrol Sensor and Receiver Kit - Wireless up to 400ft -by Unique Imports

Amazon.com When a visitor--wanted or unwanted--approaches a house on foot or in a vehicle the motion-detecting sensor unit of this warning device sends a signal to the receiver indoors, which chimes an alert. The device is wireless and has a 400-foot range. It requires three C-cell batteries for the receiver and one 9-volt battery for the transmitting sensor. (Batteries are not included.) The sensor is housed in weather-resistant plastic, installs with a screw on any surface, such as a mailbox post, garage, or door, and measures 4-1/4 inches high, 2-5/8 inches wide, and 2-1/4 inches deep. The portable receiver has an identical housing, can be set to chime high or low (or turned off), and measures 5 inches high, 3-5/8 inches wide, and 1-1/2 inches deep. --Fred Brack Product Description Wireless Driveway Patrol alerts you the moment someone enters your property. SAVE BIG! As seen on TV! With the Driveway Patrol, you'll always have advanced notice that someone's on their way to your door. Compact, discreet motion-sensor unit installs on garage, mailbox, fencepost... nearly anywhere. And when triggered, it sends a wireless signal to the receiver unit, up to 400 feet away! When the unit's adjustable chime tells you you're about to have a visitor, you can prepare accordingly. Installs in minutes, no tools needed; Completely wireless; Alerts you to visitors, trespassers, deliveries and more; Sensor is extremely weather resistant. 3 5/8 x 1 1/2 x 5"h. Receiver uses 3 C batteries, 2 5/8 x 2 1/4 x 4 1/4"h. Sensor takes one 9V (not included). 2 lbs.; Order yours now! Driveway Patrol