Depend on this wireless keyboard and mouse combo to work perfectly every time you sit at the desk. Spill-resistant, full-size keyboard won't require new batteries for 36 months and your mouse stays powered for 18 months. Plug and play your keyboard and mouse with one tiny USB receiver with Unifying technology delivers a reliable and encrypted wireless connection up to 10 meters away with virtually no delays or dropouts. Convenient and essential hot keys give you direct access to media, calculator and battery check functions. All keys have been optimized for improved accuracy and reduced noise. Palmrest and adjustable tilt legs keep you comfortable for long stretches. Stay productive for hours with a wireless mouse designed to fit comfortably in either your right or left hand. The contoured shape and soft rubber side grips fit comfortably in your palm. Enhanced tracking and precise cursor control keep you in command.General Information Manufacturer: Logitech Manufacturer Part Number: 920-008671 Brand Name: Logitech Product Model: MK540 Product Name: MK540 Wireless Keyboard Mouse Combo Packaged Quantity: 1 Product Type: Keyboard & Mouse Keyboard/Keypad Keyboard/Keypad Type: Keyboard Keyboard/Keypad Connectivity Technology: Wireless Keyboard/Keypad Wireless Technology: RF Keyboard/Keypad Features: Spill Resistant Hot Keys: On/Off Switch Keys Layout: QWERTY Pointing Device Pointing Device Type: Mouse Pointing Device Connectivity Technology: Wireless Pointing Device Wireless Technology: RF Movement Detection: Optical Movement Resolution (dpi): 1000 Scroller Type: Scroll Wheel Ergonomic Fit: Symmetrical Interfaces/Ports Keyboard/Keypad Host Interface: USB Pointing Device Host Interface: USB Battery Information Battery Included: Yes Battery Size Supported: AA Battery Chemistry: Alkaline Power Description Power Source: Battery Physical Characteristics Keyboard/Keypad Color: Black Pointing Device Color: Black Keyboard/Keypad Height: 0.94" Keyboard/Keypad Width: 18" Keyboard/Keypad Depth: 7.62" Pointing Device Height: 1.54" Pointing Device Width: 2.43" Pointing Device Depth: 4.39" Keyboard/Keypad Weight (Approximate): 1.77 lb Pointing Device Weight (Approximate): 2.59 oz Miscellaneous Package Contents: MK540 Wireless Keyboard Mouse Combo Logitech Unifying Receiver 3 x AA Alkaline Batteries (Pre-Installed) User Documentation Operating System Compatibility: Windows 7 Platform Supported: PC Device Supported: Desktop Computer Recycled: No Assembly Required: No Environmentally Friendly: Yes Environmental Compliance: Waste Electrical and Electronic Equipment Directive (WEEE) Country of Origin: China Warranty Limited Warranty: 1 Year Additional Warranty Information: 1 year limited