V450 NANO LASER MSE BLK NANO RECV 2.4GHZ 2AA BATT The Logitech V450 Nano is always ready when you are. Featuring a nano-receiver small enough to stay in your laptop all the time - even when you pack your laptop away - the V450 Nano is always ready to go. Advanced power management gives you up to 1 year of battery life, and the gently contoured shape with soft rubber grips gives you exceptional comfort.