Enhance your productivity with the wireless convenience of the Lenovo essential wireless Combo keyboard and mouse. Connect both keyboard and mouse using only one Nano USB wireless receiver without the hassle and the clutter. The slim 2.5 zone wireless keyboard has a responsive key feeling and offers premium typing experience. The standard size wireless mouse compliments the keyboard in design and functionality. Maximum Operating Temperature 40 degrees Celsius (104 degrees Fahrenheit), Minimum Operating Temperature 0 degrees Celsius (32 degrees Fahrenheit).