Wireless Motion Alert from Chamberlain alerts you the moment someone enters your property. With Chamberlain's Motion Alert, you'll always have advance notice that someone's on their way to your door. Compact, discreet motion-sensor unit installs on garage, mailbox, fencepost... nearly anywhere. And when activated, it sends a wireless signal to the receiver unit, up to one-half mile away! Then, when the unit's adjustable chime tells you you're about to have a visitor, you can prepare accordingly. Installs in minutes; Completely wireless; Receiver unit accepts signal from up to 4 sensors (one included), so you can protect a whole perimeter.; Weatherproof components.; Sensor: 3 1/4 x 5 1/4 x 3"h., uses 4 AA batteries (not included).; Receiver: 3 1/2 x 3 x 1 3/4"h., uses 4 AA batteries (not included). 1 lb., 11 ozs. Additional Sensors sold below.; Act Now! Chamberlain Wireless Motion Alert / Sensor KitYou will not be disappointed with Chamberlain CWA2000 Wireless Motion Alert
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