This is a replacement wireless keypad for M13-631, M3-631, ML-631 Marantec garage door openers. It can control up to four Marantec openers that operate on 315MHz frequency. It has a sleek design with a sliding cover and a smooth interface. It is weather resistant and requires a 4-digit pin code to operate. The kit comes with a spacer kit for mounting on metal surfaces, a battery, mounting screws, and programming instructions. Order now and get it shipped the next business day.