5Pcs/Lot Wired Door Window Magnetic Sensor Switch for PTSN GSM Wired Alarm System Door Detector

No external power supply, connect to wired alarm control panel GND and N.C ports directly! ? Specification :
Material Shield: Anti-fire ABS
Connecting Mode: N.C.
Rated Current: 100mA
Rated Voltage: (VDC)100
Operating Distance: More than 15mm, Less than 25mm
Rated Power: 3W
? Package includeds :
5 x KERUI Wired Door Switch
? Details pictures :