LED dimmer for constant voltage with four channels for controlling and colour mixing of LEDstrip RGBW and/or an RGBstrip and white LEDstrip. Wired control via spring-loaded pushbuttons and/or wireless via 7 or 42 channel remote control with functions for 8x programmable base colours, scenarios for colour change and dimming. RGB and white can be controlled independently. Up to 5 slaves can be connected to a master with synch cable that is included with the slave. Connects to LED-trafo 12/24V.