Note: When configuring the keyboard's software settings, please make sure your computer has a standard USB type-A interface, the keyboard can only be directly connected to the computer via the USB cable (HUB adapter and Thunderbolt USB will not be supported). The restrictions apply only to configure the keyboard's software. Once set, you can still connect via HUB adapter and thunderbolt USB. Please download the keyboard's configuration software according to the URL on the package box / user manual After opening the software, when you need to use the "Key Mapper / Custom Macro / Quick Macro / Options " function, you need to click the "Connect" in the top-left to connect the keypad. Once set up, you need to click the "Upload" to save. Otherwise, all settings are invalid. Specifications: Key number: 9 Keyboard switch: OEM Outemu blue switches Shell material: High-quality plexiglass Backlit: Blue LED 4-layer profiles stored onboard Keyboard Interface: USB Type-C Rating: DC 5V,