Features: 1.Can be configured with different hosts to issue loud alarm sound and scare off illegal persons. 2.High sensitivity, achieve effective effects of alarming and theft prevention. 3.Normal open and normal close output mode, 15-25mm long working distance, safe and reliable. 4.It is especially designed for shops, shops, garages and other similar places. 5.When the magnet is close to the switch, the reed switch contacts stay close and the signal line is connected. If the door is opened, the magnet leaves the switch, the reed contact is disconnected, and the signal line is interrupted, which is called open Specification: Features:_x000D_ _x000D_ Can be configured with different hosts to issue loud alarm sound and scare off illegal persons. _x000D_ High sensitivity, achieve effective effects of alarming and theft prevention. _x000D_ Normal open and normal close output mode, 15-25mm long working distance, safe and reliable. _x000D_ It is especially designed for shops, shops, garages and other similar places. _x000D_ When the magnet is close to the switch, the reed switch contacts stay close and the signal line is connected. If the door is opened, the magnet leaves the switch, the reed contact is disconnected, and the signal line is interrupted, which is called open circuit alarm. _x000D_ _x000D_ Specifications:_x000D_ Condition: Brand New_x000D_ Shell Material: ABS_x000D_ Shell Color: White_x000D_ Maximum Switch Voltage: DC100V/200V (optional)_x000D_ Maximum Switch Current: 0.5A_x000D_ Maximum Switch Power: 10W_x000D_ Working Distance: 15-25mm_x000D_ Output Mode: NC--normal close_x000D_ Wire Length: Approx. 29cm/11.4in_x000D_ _x000D_ Package List:_x000D_ 1 * Pair of Wired Contact