[Plug & Play 2.4G Wireless Connection]One 2.4 GHz USB receiver can connect both the keyboard and mouse, can also be used separately, plug & play, no need to download any software.2.4 GHz wireless provides a powerful and reliable connection up to 33 feet(10m) without any delays.(Wireless USB receiver is at the bottom of the mouse).No Delay, No Dropout. [Power Saving Extends Battery Life]After 10 minutes of inactivity, the wireless keyboard mouse combo will automatically go into sleep mode to save energy.The keyboard requires two AAA battery, and the mouse requires one AA. [Silent Wireless Mouse]Computer mouse provides whisper silent click, no need to worry about disturbing others to rest while working or playing.DPI adjustable mouse provides 3 levels of DPI (800/1200/1600) to meet your different needs in terms of sensitivity. [Compatible wireless mouse and keyboard combo]Includes a full-size keyboard and a high-sensitivity mouse.Works with your PC, Desktop, Laptop or Notebook.Compatible with Windows XP / Vista / 7 / 8 /10 operating systems. [Power indicator]the new battery into the keyboard and mouse, if the normal connection with the computer power red light will flash 5-8 seconds off, if the computer is not normally connected to the power red light on for a moment on off.Low battery mode is to press any key power red light will flash.So when you first start using, the power red light keeps flashing for 5-8 seconds is normal. [IMPORTANT]The Keyboard and Mouse Share a USB Receiver, and the USB is Stored at the Bottom of the Mouse. The Keyboard Slot Does Not Have Any Items and Can Be Used to Store USB.