LOGI MK540 Advanced Wireless Combo US 80000596 920-008685 Product Description: Logitech MK540 Advanced - keyboard and mouse set - QWERTY - US International Input Device Device Type: Keyboard and mouse set Interface: 2.4 GHz Wireless Receiver: USB Logitech Unifying receiver Connectivity Technology: Wireless Localization and Layout: QWERTY US International Numeric Keypad: Yes Pointing Device: Mouse - wireless - optical - right and left-handed Buttons Qty: 3 Manufacturer Warranty: 2-year warranty