Long Range Up to 1,000′ from motion sensor to wireless receiver (range will be affected by walls, trees, etc.). Easy installation Quick Start Guide will help you set up in minutes. Extra loud, adjustable volume. Over 30 quality ring tones to choose from! Expandable An unlimited number of extra sensors or receivers can be added to give you complete coverage of your home or business. Lifetime manufacturer’s warranty. The Guardline Driveway Alarm can run on batteries as well as on the included AC adapter. The sleek and compact receiver is simple to program and utilizes a tone-rich chime and flashing LED lights when a sensor is tripped. The outdoor motion detector’s infrared sensor come with protective coverings to protect it from the elements and an easy-mount bracket. Each set includes one motion sensor and one receiver, but an unlimited number of additional sensor.