[Discontinued] KELVIN CONTROL, Slave Controller, 12V/24VWith SLV KELVIN CONTROL, colour brightness and colour temperature can be controlled independently of each other and adapted to your desired lighting situation. You decide on the shades of white, from daylight to warm feel good lighting. The KELVIN CONTROL SLAVE Controller for 12V and 24V is used to extend the Master Controller 470681 and the wall control panel 470680.