XINGYHENG 20Pcs(10PAIRS) Rc-33 NC Recessed Wired Embedded Door Contact Sensor Alarm Window Magnetic Reed Switch Networked Door Opening Sensor for Living Room Bedroom Restaurant and Office - XINGYHENG-120

• SUPER MATERIAL: The product is made of ABS Housing Material and copper steel, NC Recessed Wired Door Contact Sensor, the design of the sphere with strong magnet gives a fresh feeling. TOTAL QUANTITY: 10 pairs magnetic Door Switch. Model: RC-33. Wire Type: 24AWG EACH SIZE(Approx): 17 x 10.6mm / 0.67 x 0.42-inch (H*D) Cable Length(Each): 25cm / 9.8-inch. Contact Type: NC (Normally Closed) Actuation Distance: 18mm ± 5mm Max. Current: 0.5A CHARACTER: NC means Normally Closed: When the magnet together, the circuit is conductive( light on ). when the magnet separate, the circuit is not conductive ( light off ). When make order,please check carefully! WIDELY USES: Work as an anti-theft alarm, ideal for metal door and window, in use with any and all commercial or residential card access systems as well as all security burglar alarm system.