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.
Chamberlain® Wireless Motion Alert / Sensor Kit
Additional Wireless Motion Alert Sensor
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