2gig & vivint compatible door or window sensor smart home direct security the dw10-2 is a surface mounted door/window contact that can be installed on doors, windows, and many other objects that open and close. the sensor transmits signals to 2gig control panels when a magnet mounted near the sensor is moved away from or closer to the sensor. the sensor has an external input that accepts n/c dry contact devices. the sensor is also equipped with a cover tamper for additional security. this sensor comes with an adjustable magnet that can be used for custom sized doors/windows