The Model DT-4A 4-Channel Visor Transmitter is a wireless radio control designed for use with automatic garage/gate operators and access control systems. The transmitter can be used with one four-channel receiver (DR4), two two-channel receivers (DR2) or four single-channel receivers (DR, DRQP or DRM).
-Can activate one DRG gate receiver and up to three separate Delta-3 receivers
-Visor mounting clip supplied
-9-volt battery included
-Codes: 256 independent codes for gate + 64 multi-channel codes for doors (set by dip switches)
-RF frequency: 310 MHz
-Dimensions: 2.16" W x 3.75" H x .95" D