PIR motion sensor with improved wireless transmission range, battery life and modern styling. Senses motion in a 40 ft. range in a 90 arc. Switchable between 1-or 2-pulse count for sensitivity control. Supplied with adjustable angle wall bracket. Installs in seconds with 2 screws. Requires 4 AA batteries (sold separately).These new improved wireless sensors & accessories work with the Pro2000 Security System (#7326). Also compatible with existing owners of the now discontinued 7-Piece Wireless X10 Security System. Improved design gives longer wireless range and battery life. 256 security codes with the 7-Piece Wireless X10 Security System.