LiftMaster 41A5021-1ATS receiver/logic boards from Garage Door Supply Company are 390 MHz LiftMaster replacement logic boards for LiftMaster ATS211R and ATS211X light-duty commercial garage door openers. Each board assembly includes a circuit board and end panel, as well as a multi-function wall control panel. Find all the replacement parts you need with steep discount pricing for commercial and industrial-duty garage door and gate operators. Product Highlights: