Features:
1. Work as an anti-theft alarm, ideal for metal door and window.
2. These are the door contact sensors that are in use with any and all commercial or residential card access systems as well as all security burglar alarm system.
3. 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,pls check carefully!

Specification:
1. Model: MC-34A
2. Max. Current: 0.3A
3. Color: White, Silver Tone
4. Max. Contact Power: 3W
5. Working Voltage: DC28V
6. Material: ABS (Housing), Metal
7. Max. Actuation Distance: 13mm
8. Cable Length(Each): 25cm / 9.8-inch
9. Contact Type: NC (Normally Closed)
10. Product Name: Magnetic Door Switch
11. Size(Approx): 14 x 6.5mm, 11.7 x 5.7mm(H*W)

Package Included: 5 Sets x Magnetic Door Switches with cable

Note: Door magnetic induction can only provide a switch signal to the device, which can not directly load the power, nor directly connect the lamp!