The WB-201 is an oversized push button designed to wirelessly open Skylink"s line of door openers. Excellent for use by the physically challenged, the elderly, or individuals with mobility limitations, it installs easily to almost any wall or firm surface. This device transmits using Skylink Rolling Code Technology for better security. The WB-201 is designed for use with: Skylink DM-100 Swing Door Opener with Magnetic Lock Skylink Swing Door Opener with Electric Strike