With Lane Alert, you'll always be notified ahead of time that someone is coming to your door. The compact, discreet motion sensor unit can be installed in your garage, mailbox, fence... just about anywhere. When triggered, it sends a wireless signal to the receiving unit to let you know that a visitor has arrived and you can prepare accordingly. Get notifications when motion is detected, so you don't have to worry about someone walking around without your knowledge. feature: Alerts you when people come to your driveway or where you don't want people to go Use it to monitor internal or external We recommend placing this unit undercover to prevent rain and direct sunlight from affecting infrared motion detection Play Beethoven's "Fr Elise" Specification: Material: ABS Range: 150m Power: 1X 9V and 2X AA size batteries (not included) Detector Dimensions (L x W x H): 6.5 x 4.5 x 9cm Receiver Dimensions (L x W x H): 7 x 3 mx 9cm Package Dimensions (L x W x H): 27 x 16.5 x 7cm Gross weight: 240g Package Contents: 1 detector 1 receiver 2 accessories 1 x Manual Shipping settings