LENOVO Pro Wrls Combo Keyboard Mouse(EN) 80008028 4X31K03968 Product Description: Lenovo Professional - keyboard and mouse set - QWERTY - US English - grey Input Device Device Type: Keyboard and mouse set Interface: Bluetooth, 2.4 GHz Wireless Receiver: USB wireless receiver Connectivity Technology: Wireless Localization and Layout: QWERTY US English Numeric Keypad: Yes Pointing Device: Mouse - wireless - optical Buttons Qty: 8 Performance: 10 million clicks Key Switch Type: Scissor-Key Colour: Grey Manufacturer Warranty: 3-year warranty