Features Multi-Function: Offers default copy and paste function with additional shortcut keys for cut, cancel, select all, play, pause, volume, and forward and backward functions, enhancing efficiency and productivity. Easy to Program: Programming application with understandable English translation allows for standard macro usage and mouse simulation, providing flexibility and customizatioNOptions. Instruction Saving: Supports saving instructions on the device, eliminating the need for resetting wheNC hanging computers, ensuring seamless and hassle-free operation. Easy Operation: Equipped with a USB cable and caliper for easy programming, ensuring convenient and practical usage for the 2 key keyboard. Good Texture: Features fine workmanship, smooth appearance, and rounded corners for a safe and reliable user experience, enhancing durability and comfort. Specification: Item Type: 2 Key Keyboard Switch: Red Switch Key Position: 2 Keys Package List: Item Type: 2 Key Keyboard Switch: Red Switch Key Position: 2 Keys Note: betweendiv>If you want to use it on the for iOS or for LINUX system, you need to set it in advance on the for WINDOWS system.between/div> Package List 1 x Keyboard 1 x USB Cable 1 x Caliper 1 x User Manual