Features: Customize the button to achieve keyboard functions, mouse functions, multimedia functions, character string functions, gaming functions, and macro definition functions. Designed with mechanical blue switches for tactile feedback and crisp keystroke sound. The button curve follows ergonomic design principles for comfortable typing. Equipped with anti-slip pads on the bottom to prevent sliding during use. Suitable for office, gaming, and multimedia applications. Includes system-based key definition software, allowing customization within supported operating systems. (Note: For Linux users, configuration must be completed on a compatible system prior to connecting the device.) Note: Click open/start function is not available in wireless mode. Specification: MK321Pro Wireless triple mode 2.4G + Bluetooth Material: Plastic Color: Black Package Contents: 1 x Mini Keyboard 1 x USB Cable Note: Light reflection and different display settings may cause slight color variations between the image and the actual item. Measurement error allowance is +/- 1-3 cm.