Driveway Alarm - 800 Meters Long Range Wireless Outdoor Weather Resistant Motion SensorandDetector - DIY Security Alert-MonitorandProtect Outdoor/Indoor Property Long Wireless Transmission Range- Both the motion detector and the plug-in receiver pick up alarm signals up to 800 meters away (actual range will vary depending on the local terrain). It is a great solution even you have a long driveway or large property to monitor. The system adopts advanced wireless transmission technology(FSKandFHSS) to avoid the wireless singal interference from other wireless devices. Long Motion Detection Range- The motion sensor is weatherproof, it will detect moving people or vehicles from 10 meters to 15 meters in front of it. Advanced motion detection chip and detection angle to reduce the false alarms from dead leaves/small animals/sunlight/wind blowing/temperature changes and etc. It has 2 adjustable sensitivities(Low=10m; High=15m), ideal for driveways,walking paths, yard, garage, gate, pool and anywhere of your outdoor/indoor property you want to be alerted. Wide Range of Applications -The wireless weather resistant motion sensor can be used to monitorandprotect your outdoor/indoor property. Such as driveway, front porch,gate, pool, garage, shed and etc. Great for home, business, office and etc. The motion sensor will work properly at all the seasons. Working Temperature range from -30 to 150 degree fahrenheit. Plug and Play, Super Easy to Install - Power on the motion detectory 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 Expandable System -The unit includes 1 plug-in receiver and 1 motion detecotor. Expandable up to 4 detectors and unlimited receivers for complete coverage of your outdoor/indoor properties. The receiver has 5 adjustable volume levels(includes mute mode) and 35 optional melodies. Match different melody with different motion detector around your property to differentiate where motion is being detected.