Logitech MK550 Wireless Wave Keyboard Mouse Combe Black Wave-shaped key frame Cushioned, contoured palm rest Hand-friendly laser mouse - 920-002555 Curve appeal Your hands get cradled in comfort by the Comfort Wave Design—Wave + Curve + Palm Rest. Palm pal The mouse with advanced precision tracking keeps your hand happy and supported with contoured sides and soft rubber grips. Power-packed The mouse and keyboard are so energy efficient you just might forget they use batteries at all. Wave-shaped key frame Your fingers vary in length. So with its gradual wave-shaped contour, this keyboard supports the actual, varied lengths of your fingers. Cushioned, contoured palm rest Hand-friendly laser mouse Batteries without hassle Logitech® Unifying receiver The tiny wireless receiver stays in your laptop—there’s no need to unplug it when you move around—and connects both the keyboard and mouse. Learn more about the Unifying receiver. Advanced 2.4 GHz wireless connectivity So you can work or play in more places—like your comfy couch—the long-range wireless connection virtually eliminates delays, dropouts, and interference. 128-bit AES encryption It helps protect your information by encrypting data transfer between the keyboard and receiver with one of the highest levels of data encryption available. Adjustable keyboard height Three options for leg height allow you to adjust the keyboard to the height that feels most comfortable to you. SPECIFICATIONS System Requirements Windows-based PC Windows® XP, Windows Vista®, Windows 7, Windows 8, Windows 10 USB port Internet connection Warranty Information 3-year Limited hardware warranty Package Contents Wireless Keyboard K350 Wireless Mouse M510 Logitech Unifying receiver 4 AA alkaline batteries (pre-installed) User documentation Part Number PN 920-002555