Kramer Electronics RC-3000 RC-3000 is a programmable remote control for Kramer switchers with RS-232 and RS-485 control. Up to 15 RC-3000s can control up to 15 Kramer switchers in a single system. Memory Locations - Stores up to 8 multiple switches as presets to be recalled and executed when needed. ALL / OFF Controls - Sends one input to all outputs, can disconnect all outputs, or turn off individual outputs. Audio Breakaway Switching. Control - Front panel, RS-232 (K-Router Windows - based software is included), and RS- 485, contact closure and external keyboard up to 128 input/output combinations. Standard 19inch Rack Mount Size - 2U.