Upgrade your home security with this 2 Pack Magnetic Reed Switch NC NO kit – a reliable, surface-mounted wired door and window contact sensor solution designed for DIY enthusiasts and professionals alike. Each magnetic switch delivers precise open/close signal control for your alarm system, offering support for both Normally Closed (NC) and Normally Open (NO) configurations. Our reed switches come pre-wired with 22AWG tinned copper cable (30cm) for stable signal transmission and quick connection to your DC 5V, 12V, or 24V home security system, smart controller, or access control unit. Whether you're installing on wooden doors, sliding windows, cabinets, toolboxes, or storage sheds, the included accessories make setup effortless. This complete installation kit includes: 2 magnetic contact switches in durable fire-retardant ABS housings (black) 2x 22AWG pre-attached signal wires (0.34mm², 30cm) 8 screws for secure mounting 1 Phillips screwdriver (bird-head 3.0) 2 strong double-sided adhesive pads (10×20×1.5mm) for tool-free application With a sensing distance of 10–20mm, these magnetic proximity switches are ideal for DIY door alarm setups, window intrusion detection, garage door automation, cabinet access sensors, and more. Whether you're outfitting a smart home or building a hardwired gap alarm system, this sensor kit provides dependable, professional-grade performance. ⚠️ Note: These magnetic sensors do not output power directly. They must be connected to a control panel, relay module, or smart alarm system to function.