Among the smallest wireless door/window contact currently available, the wafer-thin profile of the EVDW4975 provides a streamlined, practically non-existent look once installed. The contact can be easily mounted to a window frame with double-sided tape, eliminating the need for drilling. This not only reduces installation times but also retains the integrity of window warranties. A generous magnet gap of 5/8Ë (16 mm) easily accommodates larger door or window frames. The EV-DW4975 is built with reliable 433 MHz technology and is compatible with all current DSC wireless receivers. Significantly smaller than competitor door/window contacts, the EVDW4975 is housed within a compact casing that allows it to be used for the tightest-fitting installations. Once installed, the contact is inconspicuous and complements the decor of most homes. It is built with reliable 433 MHz technology, uses a long-life lithium battery and is compatible with all current DSC wireless receivers.