The reliable wireless combo with the tiny logitech unifying nano receiver long range wireless logitech advanced 24 ghz wireless gives you a fast reliable connection up to 10 meters away with virtually no delays or dropouts carry around mouse you can take the sleek mouse anywhere you take your computermdashthanks to its comfortable size and the tiny nano receiver extended battery life a 24 month keyboard and 12 month mouse battery lifemdashplus onoff switchesmdashmean you can go for months