New in sealed box. Product OverviewYou can add extra protection to your home or business. With additional LaserShield Wireless Detection Units you can protect all areas in your home and business. The Wireless Detection Units communicate with the Master Alarm Unit via wireless radio signals and have a range of 150 feet (without obstructions). Each Wireless Detection Unit protects up to 1200 sq. ft.Wireless Detection Unit includes: Built in 105 decibel siren, Emergency Panic Button, Built in back up battery, Pet friendlySets up in seconds, No installation or programmingProfessional Emergency Response available with Rapid Response Monitoring to summon authorities during an emergency and monitoring is optional and requires NO long term contract; activation details included with system12 Wireless Detection Units can be added to expand the system at any time View more great items