You"ll always know when your garage door is open with the easy-to-install Ideal Security SK623 Wireless Garage Door Alert. This motion-sensing security system can be used as an alert that auto dials you with a notification when someone has opened the garage door or it can be linked to Ideal"s siren alarm. This set includes a garage door sensor, remote control keychain, batteries, and a receiver with 6 sounds to choose from and a wireless RF transmission distance of 100 to 130 feet. About Ideal Security Ideal Security"s tradition of innovation began back in 1956 and the experience gained over this past half-century has given them the experience to be a reliable market leader. Their focus on creating value for their customers and consumers has led Ideal Security from humble beginnings in Lasalle, Quebec to an impressive operation spanning several factories and warehouses throughout Quebec, Ontario, and Pennsylvania. This network meets the demands of North America with new concept hardware and security programs, patented products that are environmentally responsible and quality oriented to provide the best security available, Ideal Security. Garage door sensor with wireless receiver. Works as an alert and/or alarm. 6 chimes to choose from. Can connect to 5 additional sensors. Includes batteries for each device.