Công tắc từ không dây Networx GE Security NX-450 The NX-450 (white) Door/ Window Sensors (60-670-95R) can be installed on doors, windows, or many other objects that open and close. The sensors transmit signals to the control panel when a magnet mounted near the sensor is moved away from or closer to the sensor. The sensors include an input that accepts external hardwired devices such as flush-mounted door/window contacts. […]