1. The knob has 5 operations that can customize different functions, characters, key combinations, etc. 2. The aluminum alloy shell processed by CNC has a full metal feel and feels very stable; the bottom plate is a plastic plate, otherwise the signal cannot be transmitted. 3. The light defaults to power saving mode, and the lighting effect can be changed through the setting tool, or the light can be turned off after saving with MODE_0 settings. There is also a lighting effect when using wirelessly. 4. Define: the knob can be rotated clockwise, pressed, or counterclockwise. the knob and hold it to rotate clockwise, and the knob and hold it to rotate counterclockwise. All can be customized. 5. All settings need to be connected to the computer via a TYPE-C data cable. 6. The use of Bluetooth is the same as the daily use of mobile phone Bluetooth. Just search and pair. When using Bluetooth, the LED lighting effect defaults to energy-saving mode, and can also be changed to always on, which shorten the continuous use time. Note: When the wireless is used continuously until the battery power is too low, it stop working, and you can charge it in time. If you don't use it for a long time, you can disconnect the wireless connection. If you don't use it for 3 minutes after disconnection, it enter sleep mode. 1. Single character modification; 2. Continuous character modification (supports up to 18 characters); 3. Combination keys; 4. Macro settings; 5. Mouse settings; 6. One-key password settings; 7. Time delay settings (each key can be set to a time delay); Specifications: A Bluetooth model (wired use + Bluetooth use) Color: Black Material: Aluminum Plastic Package Contents: 1 * USB Volumes Controller 1 * USB cable 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.