eMacros ADVANTAGE-30 years+ solar driveway alarm wireless and solar driveway alert system produced in our own factory with our leading-edge systems technology. Wireless Solar Driveway Alarm Includes 1 AC Powered Receiver and 4 Sensors. SOLAR POWERED NO NEED REPLACE BATTERIES- The sensor is powered by a battery which will be charged by the solar panel, so no need replace the battery, the sensor also can be powered by the DC5V power adapter..EASY TO INSTALL- Quick Start Guide has you operational in minutes. Can expandable up to 4 sensors and unlimited receivers for complete coverage of your perimeter. Wireless driveway alarm Detects movement from humans, cars, and large animals. There are 4 fun & unique chimes to choose from. Match different chimes with different sensors around your property to differentiate where driveway alarm wireless motion is being detected..SUPER LONG RECEIVING RANGE -We use newer technology components and excellent manufacturing techniques. Our system has been real-world tested in settings with trees, buildings, walls, and vehicles. It easily achieves a 1500FT wireless range in most conditions. It is been tested through thick forestry, hail storms, gusty winds, heavy rains, scorching heat, and snow..EXCELLENT QUALITY - Outdoor driveway alert sensor system is made with industrial-grade PVC housing, rubberized weather/water-resistant seal, and a runs on one solar rechargeable..EXTREMELY RELIABLE - Much time went into developing and testing our reliable Infrared outdoor driveway alarm wireless detector that will dependably alert you to activity around your property. False alarms are minimized by adjusting the sensitivity of the sensor “eye” with Switch. (Hi = 30ft,Low = 20ft.) See Owner’s Instruction Manual. Swivel mount to refine the focus and detection angle of the sensor.