This is a mini keyboard with custom functions, which can be used in design, stock, office, game, music, media, industrial control, testing and other fields. Metal knob, one-hand control music cut-in, volume, pause, previous song, next song, zoom in and out, previous page, next page With mouse and delay function 18 characters per key, support one-key password<br><br>Common troubleshooting: Problem 1: There is no response when the keyboard is connected to the computer, or the device prompts abnormally. Solution: Check whether cable and interface are connected properly, and then plug and unplug again; replace the USB on the computer Reinsert the connector. Question 2: After the custom software is downloaded, it cannot be opened. Solution: Check whether it is blocked by anti software and set it as a trusted file. Question 3: Why is the button or knob always "a" after connecting to the computer? Solution: Output a is the normal factory setting, open the custom software to redefine the button function. Current and voltage: DC 5V/1A Interface: type-c Axle: Outeum Red Switch Notice: Need to use system for custom settings Support hot swap Material: Plastic,Metal colour: A-Black<br><br>Package Contents: 1 x Programming Macro Keyboard 1 x data cable<br><br>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.