Logitech M515 Wireless Couch Mouse (Red) Hand-activated: Mouse is active when you grip it, so it's only "On" when you use it Made for couch- and desk-surfing: Sealed, easy-gliding base gives you accurate tracking on cushions, blankets and carpets Effortless Logitech Hyper-Fast Scrolling: Coast smoothly through long web pages with a single spin Extended battery life: Go for up to two years* without a battery change For Windows or Mac: Reliable wireless connection with tiny Logitech Unifying receiver that can stay in your laptop