The ELK-319DG is a Supervised, Wireless Sensor uniquely designed for outdoor use on swing gates or doors. The sensor and magnet can be mounted using screws (included), pipe strap style clamps, or plastic wire ties.This sensor is compatible with Elk?s 319MHz Receivers/Panels as well as many other panels that operate on the 319.5MHz Frequency and adhere to the ITI/Interlogix protocol.General InformationName: ELK-319DG ALL WTHER DOOR/GATECategory: Elk Products Inc., Intrusion & Smart Home, Intrusion Contacts, Other Intrusion ContactsUPC Code: 762158190018Country of origin: Taiwan. Country of origin is subject to change.