The Linear Delta 3 DT single-button garage door opener remote control from Garage Door Supply Company is a 310MHz remote that works with all Linear Delta 3 receivers. This replacement Linear Delta 3DT remote has eight on/off dip switches that are programmed by matching those dip switches to the dip switches on your existing remote or Linear Delta 3 garage door opener receiver. With those dip switches, there are 256 possible codes.
The Linear Delta 3 DT remote is compatible with Linear Delta 3 DT, DTC, DC, DTA and DNT00002A, and Moore-o-Matic and Ultra Lift garage door remotes. It's compatible with these Delta 3 receivers: DR, DR3A, DR-2, DR-4, DRA, DRA-4, DRM, DRQP, GRD, and GRD-2. A 9-volt battery, visor clip and programming manual is included with your 1-button remote with test/operate LED.