WIDE RANGE OF APPLICATIONS : The wireless weather resistant driveway alarm motion sensor can be used to monitor&protect your outdoor/indoor property. It's designed to detect people,vehicles,or animals entering in perimeter areas (driveway, front porche,backyard, gate, home, garage, office, mailbox,etc.) and activates alerts to the connected receiver.It alerts homeowners of unexpected intruders or visitors, keeping your property and loved ones more secure..600 Feet Long Wireless Transmission Range: After field testing and measurement in multiple scenarios, we have set the optimal wireless distance, the receiving range of the plug-in receiver and motion sensor is up to 600 feet (no obstacles), even if you need monitor a wide range of spaces, we can meet your needs too!.50-FT WIDE MOTION DETECTION RANGE : The motion sensor will detect moving people or vehicles from 35 feet to 50 feet in front of it. Improved motion detection chip and detection angle to reduce the false alarms from dead leaves/small animals/sunlight/wind/temperature changes and etc. It has 2 adjustable sensitivities( Low=35ft; High=50ft), ideal for driveways, walking paths,yard,garage,gate,pool and anywhere of your outdoor/indoor property you want to be alerted..PLUG&PLAY,SUPER EASY TO INSTALL : Power on the motion sensor by 3pcs AA 1.5V Alkaline batteries(the package does not include the batteries) and plug the receiver into the outlet,here we go. The unit has been programmed before shipped, place the sensors to walls, fence posts, trees, or any other surface,the installation time can be as little as a few minutes..FULLY EXPANDBLE SYSTEM&GUARANTEED 2-YEARS WARRANTY - The unit includes one plug-in receiver and two motion sensors. Expandable up to 32 sensors and unlimited receivers for complete coverage of your outdoor/indoor property. 4 volume levels adjustment and 35 optional melodies. Match different melody with different sensors around your property to differentiate where motion is being detected.