Logitech MK540 Advanced Wireless Keyboard and Mouse Combo Logitech MK540 Advanced is a wireless full-size keyboard and mouse combo built for precision, comfort, and reliability. Enjoy the plug and play wireless freedom of the combo, with the tiny USB receiver equipped with Logitech Unifying technology. The keyboard is spill-resistant (1) and abrasion-resistant key printing ensures your keys won’t quickly fade. The keys have been optimized for improved accuracy and reduced noise. The palm rest and adjustable tilt legs keep you comfortable for long stretches at the desk. With convenient and essential hotkeys for direct access, as well as preset Fn keys that can be personalized in Logitech Options. The contoured wireless mouse is designed to fit in either your right or left hand and features enhanced tracking, precise cursor control that keeps you in command. Keyboard Product Details: Dimensions: 7.62 x 18 x 0.94 in Weight: 28.4 oz Adjustable Keyboard Height: 3 tilt positions Special Keys: Music controls, programmable keys 10-Key Number pad Palm rest Key Type: Deep profile Caps lock indicator light On/off power switch 2 AAA batteries（Alkaline Battery） Battery life: 36 months Mouse Product Details: Dimensions: 2.43 x 1.54 x 0.45 in Weight: 2.59 oz Sensor technology: Smooth Optical tracking Number of buttons: 3 (Left/Right-click, Middle-click) Scrolling: line-by-line Scroll Wheel: 2D, optical Connect/Power: On/Off power button 1 AA battery（Alkaline Battery） Battery life: 18 months Wireless Range: Up to 33 ft (2) Compatible on Windows 7, 8, 10 or later, Chrome OS (1) Tested under limited conditions (maximum of 60 ml liquid spillage). Do not immerse keyboard in liquid. (2) Wireless range may vary based on user, environmental and computing conditions. (3) Keyboard and mouse battery life may vary based on user and computing conditions.