The M13-631 Marantec Wireless Keypad works with all Marantec 315MHz garage door openers and has the ability to control up to four 315MHz Marantec garage door openers. The new design includes an easy-to-use smooth interface with a sliding cover. It is weather resistant that uses a 4-digit pin code. The kit Includes a spacer kit for mounting onto metal surfaces, battery, mounting screws, programming instructions. When you match the 315MHz on the back of your old keypad the new M13-631 Keypad will be the right replacement for your older M3-631 or ML-631 keypads.Ships The Next Business Day.