Comprehensive Package: Each purchase includes 6 sets of the RC-33 Magnetic Reed Switch, complete with mounting screws for easy installation. This package ensures you have enough units to secure multiple entry points in your home or business. Enhanced Security Function: The RC-33 Reed Switch operates by detecting magnetic fields, making it an essential component of any alarm system. It's perfect for securing windows and doors in residential or commercial properties, ensuring peace of mind with its reliable performance. Versatile Reed Switch Operation: The switch can integrate seamlessly with both wired and wireless alarm systems, offering flexibility in security setups. It features a normally open (NO) configuration that conducts electricity when the magnet is separated, and a normally closed (NC) configuration for when the magnet is together. Switch Type Explanation: Understand the functionality with ease - NO (Normally Open) means the circuit completes when the magnet is separated, ideal for signaling openings. NC (Normally Closed) ensures the circuit completes when contacts are together, perfect for maintaining security when doors or windows are closed. Colour:White Material:plastic Package Contents: 6 x Door Magnetic Switch Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.