?100% Guarantee & After-sales Service?We are responsible for our products and customers, all items are quality checked before shipping, if you receive a defective or damaged product, we promise to refund or replace it with a new one. If you encounter problems with connectivity, device switching, etc., please be sure to contact us and we will help you throughout the process until the problem is solved!. ?RGB Programming & 7 Colours 5 Adjustable Modes?USB mini keypad has red, orange, yellow, green, cyan, blue, purple Lighting display. Mode 1: Power on (all buttons); Mode 2: Fast Power on (from the first button to the last button); Mode 3: Fast Power on (from the last button to the first button); Mode 4: Light when press (one button); Mode 5: White light on (all buttons). Note: The light only lights up with the connected USB cable, to reduce battery wear and tear. ?USB Mini Keypad Knob Function?USB mini keypad button can be turned left, right and pressed in the middle to configure functions such as magnify/decrease/mute volume, previous/next song/pause/playback, etc. button can also be used as a key input, the knob is marked with scale tips, each turn of a scale is an input, up to a maximum of 18 characters, keep turning it will always input. ?3-Mode Connection?BRIMFORD USB Mini Keypad. We have read every customer's letter carefully over the course of two years, and are now upgrading to wired, Bluetooth and 2.4G connection modes. The keyboard has a memory function, and the 2.4G mode allows you to use it smoothly in any situation, even if you switch systems, without delay or lag, after the Win7 system is set up. The 1200 mAh battery can be used for approx. 2 weeks, the green light lights up means that the battery is fully charged. ?Operation Steps Connect the USB cable to this plug & play keyboard to your PC. (Setting need connect the USB-C Cable). ? Download the software according to the website guide. ? After entering the software, select the function you want to set, and click "DOWNLOAD" after setting, then all settings will be remembered. ? If you are not a veteran player, please make sure to contact us and we will guide you through the whole process until you can use it properly. ?Download Location (Updated on 2023.02.20)?https://sikaicase.com/blogs/support/setting-for-software. ?Pre-purchase Instructions Keyboard setup needs to be done on Windows, If you want to use it on MAC, you need to set up Win and above before you can use it on Mac OS. ? Setting need connect the USB-C Cable (Included in the package). ? The software will be continuously updated based on customer feedback and our own testing results, you can always follow the links on the page, or contact us directly.