LINEAR MegaCode Garage Door Openers MCT-11 One Button Remote Control Activates one MegaCode garage door opener receiver. Compatible with all Linear-MegaCode door operator systems, including LDO33, LDO50, LSO50 and LC075 series openers. Smart Button coding . 318MHz frequency. Dimensions 2 1/2" x 2 1/2" x 1 1/2". Battery, visor clip, and instructions are included.