This driveway alert system is what everyone has been waiting for! It is wireless and predominately runs on solar power. No cabling is required and there is no maintenance. The solar beams will work up to 1km clear line of sight from the House Alert and the Outside Siren/Strobe Shed Alert. Hills, bends in the road, building and trees will reduce the transmitting distance. The transmitting distance can be increased up to 4km clear line of sight with adding four transmitters. Each transmitter will increase the distance by 1km, clear line of sight. Additional products have been added to the range with a wireless distance of either 800m or 500m.