Specification? Product type: 2.4G wireless cat mouse and keyboard set Keyboard key type: membrane keyboard Number of keyboard keys: 84 keys Number of mouse buttons: 4 keys Keyboard click life: 50M Mouse click life: 5M (silent switch design) Mouse DPI:800-1200-1600DPI Keyboard voltage/current: 3V/6mA Mouse voltage/current: 1.5V/15mA The keyboard uses the battery model: 2*AAA (battery not included) Mouse battery model: 1*AA (battery not included) Mouse + keyboard net weight: 524g Keyboard size: 344*150*27mm Mouse size: 104*68*38mm Packing weight: 1040g Packing size: 455*188*50mm Support system: Win XP/Win7/Win8/Win10/Android/Mac OS, etc. Package Contents: 1 x Wireless Keyboard 1 x 1Wireless Mouse 1 x Nano Receiver 1 x Instruction Manual How to use shortcut keys: Press FN +ESC two keys at the same time, the default is to switch between multimedia function and F1 to F12 shortcut keys. For example, press F7 to bring up the browser home page. Press FN + Esc at the same time The shortcut function of F7 will pop up.) Product installing instructions: 1. Remove the USB receiver from the bottom of the mouse and plug it into the USB port of your computer. 2. Open the battery cover at the bottom of the mouse, and put an AA (No.5) battery into the battery bin (note that the positive and negative polarity of the battery must be correct). The LED light at the bottom of the mouse will light up once and then turn off, and cover the battery cover. 3. Open the battery cover at the bottom of the keyboard, put a AAA(No.7) battery into the battery bin (note that the positive and negative polarity of the battery must be correct), and close the battery cover. 4.The USB receiver can also be loaded into the receiver slot at the bottom of the mouse when carried out or not in use.