Panasonic SL-VPK01 has one input and one output. Since each S-LINK V control unit has 512 inputs and outputs, up to 256 SL-VPK01 units can be connected. It’s easy to set the address and select the lamp color with the SL-VAR1 address setting remote controller (optional). This approach dramatically reduces work by eliminating the need to turn setting switches on and off and memorize switch combinations as in the past. Additionally, the remote control can be used to check the current settings. It can be selectable from green (default), red, blue, and a two-stage indication.