The ELK M1 Keypads M1KP, M1KP2/3, M1KPNAV, K1KPAS as well as bus devices that take a keypad location M1KAM and P212S Power Supply are Indoor rated only with an operating temperature range of 32 – 120 Degrees Fahrenheit. At this time ELK does not offer an Outdoor rated keypad. How far would it be from nearest environmental conditioned (heated/cooled) location to the outdoor building? It is possible to connect a 26Bit Wiegand Reader approximately 25 feet from a supported keypad or the M1KAM.