Logitech MK850 performance wireless keyboard and mouse combo provides a better way to type and manipulate your mouse with a cushioned palm rest, a wrist pad, contoured mouse and curved keyframe that encourages the proper hand positioning. Adjustable legs allow you to alter the typing angle based on your comfort level. Switch among three different connected devices thanks to the Logitech Unifying USB receiver or with Bluetooth technology, while both the mouse and keyboard sync together with customizable combinations of function keys and mouse buttons..Bluetooth connectivity or Logitech Unifying receiver required to work.Performance keyboard and mouse work together to increase productivity.Wireless connectivity works with up to three devices on computers, laptops and smartphones.Function keys along with mouse gestures and clicks create customizable programming.Ergonomic design works well for all-day keyboarding.Maintain power levels for 36 months in the keyboard and 24 months in the mouse with batteries for convenience.Logitech MK850 performance wireless keyboard and mouse combo makes computing more comfortable at work.. Sync With Three Devices Both items link to up to three devices, including a computer, tablet or smartphone, and you can switch among the devices with the touch of the button. Manipulate apps on a tablet or smartphone to get ready for a business trip, then instantly move to your desktop computer to continue your daily tasks. Get ready for presentations and finish reports depending on the device you need at the time. Comfort Features A palm pad and wrist pad support your hands as you type to alleviate concerns regarding repetitive motion. Concave keys support your fingertips as you glide across each button with quiet keys that reduce noise. The contoured mouse and soft rubber surface feel soft against your hand while you click, scroll and navigate your devices. DuoLink Functions Customize DuoLink buttons on your mouse by syncing your function keys with mouse clicks and gestures. Your mouse clicks and gestures have different programming attached to them when you press function keys and then press or move the mouse a certain way. This creates a macro-style programming feature that saves time when you use these features time and again on your devices. Safety Data Sheet