EASY SMART HOME CONTROL FOR EVERYONE: Brilliant touchscreen panels with built-in Tuya Smart APP make it easy for everyone at home to control popular smart devices, lighting, locks, thermostats, scenes and more by simply. EASY TO REPLACE: You only need to connect the wires hidden in the wall to the dimmer. If you need, you can quickly connect your home theater speakers and fix them on the wall. The whole process only takes 15 minutes. TUYA LIGHTS & SMART LOCK CONTROL: Now everyone at home can easily browse and play music with different brand speakers, control anywhere smart lights in your home, and unlock the door with a compatible smart lock-all without needing a phone. Relay version External interface description 1,TF card: read TF card interface. 2,TYPE-C USB: external USB, with conversion cable can read U disk; Upgrade. 3,Button: short press the lock screen/light screen; Press and hold to power off/restart. 4,Upgrade key: Standby upgrade key port. 5,With speaker sound hole 6,Knob: press to switch equipment. Rotate to adjust light brightness, curtains, air conditioning, volume, etc. 7,485: connected to 485A 485B through the external device to control the background music, you can also control other 485 devices through the machine. 8,Ethernet port: Supports wired network. 9,Disassembly mouth: disassemble the shell fixing screw pry open gap L Live line input N Neutral line input, L1 L2 is 2 for the switch control line respectively connect the corresponding light live line output (based on the actual host access) Color: As Shown Material: Aluminum Alloy+PC Package Contents: 1*Tuya Panel Control Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.