Wireless Vanishing Door/Window ContactThe 57A00 1 Vanishing Door Window Transmitter is an ultra thin (1. 5 in. H x 1 in. W x 0. 38 in. D) Supervised wireless contact. It has beveled edges that vanish into any decor. It also features a bypass button that allows you to manually bypass the transmitter, which automatically restores when the magnet is replaced. Requires a Leviton Security and Automation 64 Zone Wireless Receiver (Leviton Security and Automation part #45A00 1). Uses CR2032