Get real-time detection of activity, unauthorized access and open/closed state of a window or door. This device's quick-connect feature allows it to be easily connected to the SS6420 using a C6420 cable. The low-profile surface mount design is quick and easy to install using self-adhesive tape or provided screws. This door contact has disconnect sensing. Includes C6420-40 quick-connect cable (12m). Uses GE 1138T-N door contact.