This is 3 units only. New never used. The DX-40 (40'x40' coverage) improves security by supervising PIR and Microwave signals and reporting either PIR masking or microwave failure. Microwave shaping creates an 85° pattern which 'fits' rooms better, simplifies installation, and reduces microwave spillage. "Quad Zone Logic" PIR technology provides 'Pet Immunity' while still maintaining high catch. Simple jumper control for Short Range or Long Range detection and 3 bright LEDs make installation easy. Spec Sheet in PDF format OP-DX-40Regular price: $52.00Special price: $46.75Choose: No power supplyRTD12/5RT - 12VDC power supply (+12.00) Packaged security camera systems | Security Cameras | Unitized Security Cameras | Board & Mini Security Cameras | Covert security cameras | Video transmission | Security Camera Lenses | Monitors | Time lapse recorders | Switchers Quads Multiplexers | Housings & mounts | Wireless video | Installation Necessities | Motion detectors | Power supplies | Cabinets & Racks | Power protection | Video Signal | Digital Video Recorders | Remote Video Systems | Video Over Network | Security Products Contact Our Sales Dept. Comments to: webmaster@securityideas.com Site design by Superior Media Security Design Services family of companies securityideasvar.com | cctvhardware.com | allkindscable.com | securityideas.com | buyviconcctv.com www.securityideas.com is TM & © 1999-2008 Security Design Services Corp. All promotional art, characters, logos and other depictions are TM & © their respective owners. All Rights Reserved.