Digi-Code 2 Button Keychain Transmitter 300mhz - Multicode Compatible DC5070 Multicode compatible 2-channel remote control transmitter. Digital format with 10 dip switches allows 2 sets of 1024 possible code combinations. This one convenient transmitter allows control of 2 separate operations, garage doors or gates. This is ideal for community gates with individual garages. 2 sets of coding switches, one for each door or gate.