SOLAR powered NO NEED TO REPLACE BATTERIE--30 years + solar wireless driveway alarm and solar driveway alert system produced in our own factory with our leading-edge systems technology. EXTREMELY RELIABLE AND WATERPROOF- The outdoor motion sensor is a waterproof(IP66) fully-enclosed design. The working temperature range is from -20? to 60?. Outdoor driveway alert sensor system is made with industrial-grade PVC housing, rubberized weather/water-resistant seal, and a runs on one solar rechargeable. LONG RECEIVING RANGE-Our system has been real-world tested through thick forestry, hail storms, gusty winds, heavy rains, scorching heat, and snow. The driveway alarm sensor easily achieves a 1/2 mile wireless range(under ideal conditions). EASY TO INSTALL AND 7 CHANNELS- Quick Start Guide lets you complete the operation in minutes, 7 fun & unique chimes to choose from, matching different chimes with different sensors around your property to differentiate where driveway alarm wireless motion is being detected, please note you can not change the sensitivity for the sensor. FULLY EXPANDABLE SYSTEM AND NO INTERFERENCE WITH NEIGHBORS- A receiver could be paired up to 7 sensors for complete coverage of your property, and the new version driveway alarm won’t interference with your neighbor who lives within 1/2mile away.