Check the listing for details. 1/2 Mile Hosmart Rechargable Driveway Alarm Wireless Sensor System & Driveway. Color: 1 Receiver & 1 Sensor Tan, Condition: New. Listed at 66.24 USD. HOSMART ADVANTAGE-30 years+ outdoor driveway alarm wireless driveway alert system produced in our own factory with our leading edge systems technology. Wireless Driveway Alarm Includes 1 Base Receiver and 1 coffee Sensor powered by AA batteries. 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.Over 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 - 1/2 mile (in ideal situations). Our range is double the 1/4 mile competitors claim under ideal conditions.