?Universal Compatibility & After-Sales Service?This wireless keyboard and mice combo compatible with windows XP/Vista/7/8/10/X, Mac and other operating system. Works well with desktops, Chrome-book, PC, Laptop, Computer and more. If you encounter any problems during use, please contact us via email, we will provide a satisfactory solution. ?Wireless Optical Mouse?The mouse was optical design, even on some smooth surfaces, precise control can be obtained. 3-level adjustable DPI (800/1200/1600) allows you to choose your favorite moving speed of cursor. In addition, this wireless mouse is symmetry design, no matter you are Right handed Left handed, both hands are available, suitable for all people. ?Automatic Power Saving Function?The EDJO wireless keyboard and mouse combo has the function of automatically entering the power-saving state. When you stop using the keyboard more than 30 minutes, stop using the mouse more than 25 seconds, they will enter sleep mode respectively to save power. This feature greatly extends the battery life, you can click any button to activity the device. The keyboard need 1 x AA battery, the mouse need 1 x AA battery. (Battery Not Included). ?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. ?Ergonomic Wireless Keyboard Mouse Combo?EDJO Full-sized wireless keyboard is ergonomically designed with Palm Rest and folding holder that can keep it at an optimum slope,prevent your wrists from hurting while long sessions of typing. Keyboard is also designed with anti-slide pads so it will stay in place when you're typing quickly. Note: The USB receiver is in the battery compartment of mouse, you can find it when open the mouse battery cover.