Function Introduction: 1. Button 1 Open/Close Knob. 2. Button 2 Brightness Colour Temperature Switching Key (Backlight white light flashes three times when switching). 3. Button 3, L1 Firewire Control Switch/Scene Button. 4. Button 4, L2 Firewire Control Switch/Scene Button. 5. Knob to adjust light brightness and colour temperature by turning clockwise or anti-clockwise. (Note: This device only supports controlling sub-devices under the same gateway) 86 In-wall concealed structure, easy installation mode, no need to modify the wall, any match. Self-contained knob design, adjust the light brightness and colour temperature by rotating the knob. Smart Home Connectivity, Profiles, Device Automation, Remote App Control. Compatible with some Graffiti Eco devices. Customise linked scenes to quickly switch between scene mode and light mode. Functional interface and description: 1.Switch connection 'AC.L' fire wire input 'AC.N' zero wire input. 2. L1 L2 firewire output, respectively connected to the corresponding load firewire (single 500W or less) Installation instructions: To proper use, this product must be installed or removed by a professional electrician. The main switch of the power supply must be cut off before installing or dismantling this product to prevent . This product needs to be away from fire and water sources during installation and use. This product should not be used in wet environments (Like the bathroom)., Weight: 0.52470018356 pounds, Manufacturer: tiyao