The solar wireless motion sensor is powered by built-in rechargeable battery which can be charged by the solar panel even in rainy days, requires no wiring and easy to install. the weatherproof outdoor motion sensor has 1/4 mile long wireless transmission range and up to 50 feet wide sensor detection range(it has 3 sensitivities adjustable,Hi=50ft,Mid=30ft;Low=25ft);it is the ideal for all types of intrusion alarm application,such as driveway/walking path/front doors and anywhere of your property you want to be alerted. The system is expandable up to 32 sensors and unlimited alarm receivers for complete coverage of your property. the wireless receiver has 4 volume levels adjustment and 35 ring tones optional. Match different ring tones with different sensors around your property to differentiate where motion is being detected. Such as the melodies for the front door is “Ding Dong”,and for the backyard is “Jingle Bells”. The outdoor motion sensor is waterproof (IP66),fully-enclosed design,resistance to rain/fog/snow/wind/temperature change and etc,and the working temperature range is from -22°F to 158°F (-30℃ to 70℃).