86 In-wall concealed structure, easy installation mode, no need to modify wall, any match. Self-contained knob design, adjust light brightness and colour temperature by rotating 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. 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 same gateway) 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 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 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 bathroom).<br><br>Instructions for operation and use of product 1. Open 'Doodle Intelligence APP', enter , select upper right corner of"",Continue to select upper right corner of"".Manually add wired ZigBee gateway or scan code to bind intelligent central control gateway, the APP interface display 'Multi-function central control' or 'wired gateway' after gateway is successfully bound as shown below: 2. Composite knob dimmer switch, set to 'network mode' and wait for gateway to automatically search and network, (power on and open button a knob