Fast, reliable connection up to 10-meters with virtually no delays or dropouts thanks to Logitech Advanced 2.4 wireless technology Take this compact mouse anywhere your computer goes. Go for months without changing batteries. On/Off switches help conserve battery use. Work or play in more places. The wireless connection virtually eliminates delays, dropouts and interference and gives you a range of up to 10-meters range. Take the mouse with you. This comfortable mouse fits easily into computer bags and pocket to travel with your computer. Instant access to media controls—movies, music, Internet, e-mail, play/pause, volume and more—are one touch away The full-size keyboard with number pad, directional keys, and nine F-keys is comfortable, convenient and built to last.