Linear DT2A Garage Door Opener Remote Transmitter 310 Mhz frequency Linear gate or garage door opener replacement transmitter for the Delta 3 system 2 sets of 8 dip switches (will work with 2 receivers, i.e. 2 garage doors, 1 door 1 light...) Visor clip, 9V battery and one year manufacturer warranty included Compatible with ALL Linear Delta 3 System products Detailed programming instructions included