The 050551 premium metal wireless keypad is a heavy duty access control solution for residential and commercial gates that use automatic radio receivers. Its die cast locking aluminum cover and weather resistant construction allow permanent outdoor mounting where the keypad is exposed to rain, dust and direct sun while keeping internal electronics protected. The internal memory supports up to 256 permanent access codes plus 256 temporary codes, each using 2 to 5 digit PINs, so you can assign unique entries for family, visitors, deliveries or contractors and expire temporary codes after limited use. Four independent transmitting channels make it possible to control up to four receiver relays or separate gate operators from a single keypad, which is ideal for multi entrance properties. Operating on 433.92 MHz radio, the keypad pairs with automatic receivers such as 030200, 030205 and 030207 and provides a strong, reliable wireless link at the driveway. A low illumination night light, blue backlit stainless keys and automatic lockout after repeated wrong codes improve usability and security, while power options include the supplied CR123 internal battery or hard wired 12 V AC or DC input. This keypad is a compatible replacement for automatic 050551 style devices and is not manufactured, sponsored or endorsed by automatic, all trademarks are the property of their respective owners.