?Expandable device? One receiver can be extended to connect multiple motion sensors, and one sensor can also be connected to multiple receivers, which can protect your outdoor/indoor property in all aspects. 12 months warranty, any problem, please contact seanme, we will help you solve the problem within 24 hours. ?Easy to set up & install? The receiver of the driveway alarm system has 38 types of ringtones and 4 volume options, which can be set by simply pressing a button. The sensor with screws for easy manual installation. Different ringtones can be set for different sensors. You can judge the location of different sensor signals according to the numbers on the receiver display. ?600 ft Signal Coverage?Infrared sensing technology upgrade, the detection sensitivity can be adjusted: low, medium, and high sensitivity can be stable detection of moving objects within 15-25 ft, 25-35 ft, and 35-45 ft respectively. The motion detector signal radiation range has been increased to 600 ft and can be monitored within a 600 ft radius of the receiver to meet the needs of a large area of the property. ?Home Property Protection Equipment? This motion sensor (installed in gates, windows, driveways, garages, fences, etc.) can detect people/vehicles/animals entering private property areas and alert homeowners of intruders or visitors; it can also (installed in entrances and exits) alert owners when children or pets are gone; it can also (installed indoors) alert caregivers of elderly family members' movements. This is a comprehensive motion sensor alarm system for home and property protection. ?Solar Powered?The driveway sensor's built-in rechargeable battery can transmit a signal 9000 times when fully charged and can stand by for about 4 months when there is no sun. Solar charging can extend the working time of the battery, 8 hours of direct sunlight can fully charge it, and one hour of sunlight per day can cover one day's power consumption.