This is a Logitech MK270 wireless keyboard and mouse combo. It consists of a wireless keyboard, a wireless mouse, and the USB receiver. Batteries are included and the set is ready to use. This set is in perfect working condition. About this item 2.4GHz Wireless Connection, Plug & Play: The wireless keyboard and mouse provide a stable and reliable wireless connection up to 40 feet without any lag or disconnection. Simply plug the unifying USB receiver into your computer and start using without downloading any software. The 2 in 1 USB receiver is stored in a compartment near the battery slot on the bottom of the mouse and you can find it when open the battery cover. Note: No need for 2 separate receivers! Full Size Wireless Keyboard and Mouse Combo: The 105 keys full-sized keyboard with a tilt angle that provide you with a comfortable typing position and greatly reduce your hand fatigue while typing. The optical mouse has an ergonomic design with a contoured shape that fits perfectly in your palm, reducing hand fatigue. The 1600 DPI high precision mouse allows you to achieve smooth and accurate tracking on most surfaces, ideal for home office. Silent Buttons & Comfortable Typing: Enjoy comfortable and quiet typing experience thanks to highly responsive & low-profile keys. The quiet mouse clicks allow you to focus on your work without disturbing others. The keyboard features 12 multimedia shortcut keys for instant access to your internet, email, volume, play/ pause, mute and more. Familiar US QWERTY layout and separate number pad save you time and increase productivity. Note: The 12 function hotkeys are not compatible with Mac OS. Broad Compatibility: The external mouse and keyboard combo compatible with Windows 11, 10, 8, 7, 2000, XP, Vista, Mac OS, Chrome OS and Linux, and suitable for laptop, notebook, PC, computer, desktop, Chromebook, Mac, iMac, smart TV. The bottom of the keyboard is designed with a non-slip pad so it stays in place even when you're typing fast. The wireless keyboard and mouse combo delivers a fairly quiet typing experience - perfect for offices, coffee shops or late work at night. Long Battery Life: The keyboard and mouse features auto sleeping and power saving modes, will automatically go into sleep mode to save power after being idle for 10 minutes. To activate them, press any button of the keyboard or mouse. So they can work continuously for several months without changing the battery.