Linear Delta-3 Visor Transmitter, 4 Channel can be used with an automatic garage/gate operators & access control systems.
The Delta-3 DT-4B Digital Transmitter is a four-channel 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, DRQ or DRM). These receivers should be mounted at least 8 feet apart.
The Delta-3 radio format provides 256 different digital codes. The codes are set using the 8-position coding switches in the units.