Brand Name: LOGITECH Model No: MK275 Batteries:2 AAA batteries required. Lithium Battery Energy Content: 1.5 Watt Hours Lithium battery Weight: 0.20 Grams Included Components:Keyboard, Mouse Eight Hot Keys Plug and Play Simplicity for Windows PCs Long Battery Life **SPECIFICATIONS** GENERAL Brand: Logitech Item Height: 44 Millimeters Item Width: 15.6 Centimeters Item Weight: 726 g Product Dimensions: 50 x 15.6 x 4.4 cm Batteries: 2 AAA batteries required. Item model number: MK275 Hardware Platform: Windows XP, Vista, Windows 7 and 8 Operating System: Windows Lithium Battery Energy Content: 1.5 Watt Hours Lithium battery Weight: 0.20 Grams Included Components: Keyboard, Mouse FEATURES Reliable 2.4GHz Wireless Connection: A tiny Logitech Nano-receiver connects both the keyboard and mouse using just one USB port Long Battery Life: Get up to 24 months of keyboard power and 12 months of mouse power without changing batteries Eight Hot Keys: Instantly access your movies, music, the Internet, e-mail, volume, play/pause and more All-in-One Setup: Includes a full-size keyboard with quiet, low-profile keys plus a portable contoured mouse for comfortable control Plug and Play Simplicity for Windows PCs: Works right out of the box with Windows XP, Vista, Windows 7 and 8 - no software installation required Brand Logitech SKU LO618EL00PRJONAFAMZ-178330 Model MK-275