LOGI MK850 Performance Wirel.Combo US 80000596 920-008226 Product Description: Logitech MK850 Performance - keyboard and mouse set - QWERTY - US International Input Device Device Type: Keyboard and mouse set Interface: Bluetooth, 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 Buttons Qty: 8 Manufacturer Warranty: 2-year warranty