Magnetic contact MC-38 for door or window (reed magnetic) (OT2122-A106)

commonly used magnetic reed sensor for alarm systems on doors and windows. Of course, it can be used in combination with an Arduino, ESP8266 or ESP32. N/O normally open Voltage: max. 100V DC, 0.1A Maximum operating distance: 15-25mm Including double-sided tape and 4 screws Dimensions Length: 3cm Width: 1.5cm Height: 1cm