The DB-RLC2 is designed to directly interface with RDL control modules, such as the STICK-ON® series ST-RG1 Ramp Generator, or RACK-UP® series RU-VCA2 Digitally Controlled Audio Attenuator. The DB-RLC2 has two momentary pushbuttons, UP and DOWN. Pushing each button sends the appropriate signal back to the RDL control module. When connected to the RU-VCA2, pushing both buttons on the DB-RLC2 simultaneously causes the level to return to the PRESET level on the RU-VCA2.