?[Universal Compatibility and 12 Months After-sales service] : Our 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. Our promises that our product have a 12-month free after-sales service. Even after the return period, as long as you contact our email, we will help you solve all problems. ?[3 Adjustable DPI Wireless Mouse] : This is a optical wireless mouse with 3 levels adjustable DPI(800/1200/1600), you can get your favorite mouse movement speed by adjusting the DPI button. Optical wireless mouse also can smooth movement even on smooth surfaces. In addition, this wireless mouse is symmetry design, no matter you are Right handed Left handed, both hands are available, suitable for all people. ?[Auto-enter Power Saving Function] : This wireless keyboard mouse combo need not any switch, It has a smart power saving chip, when you stop using the keyboard more than 10 seconds, stop using the mouse more than 2 minutes, they will auto-enter sleep mode respectively to save power. This feature greatly extends the battery life, you can click any button to activity the device. ?[2. 4G Stable Wireless Connection] : This wireless keyboard and mouse combo share the same USB receiver, no need to take upadditional USB ports (Also the wireless 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. ?[Comfortable Wireless Keyboard Mouse Combo] : This wireless keyboard mouse combo has a comfortable touch and typing feel, this wireless keyboard design with palm rest and folding holder that can protect your wrists from injury even when typing for a long time. Note: The USB receiver is in the battery compartment of the mouse, you can find it when open the mouse battery cover.