Two in One The Lenovo Mini Wireless Keyboard (N5901) offers a compact way to improve your home theater PC experience. This device communicates with your PC by way of a tiny USB dongle providing an excellent range during your use. Its features include a mini wireless keyboard with track ball, palm-sized dimensions, and 2.4GHz radio frequency, as far as 10 meters control distance. A device to help navigate your media. 2.4G wireless keyboard and mouse (with track ball) combo.