The Galactic Wireless Mouse is perfect for travel or working at a desk. This wireless mouse features a small, built-in Nano receiver which receives a signal up to 10 meters away. The power-off capability preserves battery life. The Galactic Wireless Mouse includes two AAA batteries and three different DPI (800, 1200, 1600) for speed adjustment. Key Features Built-in Nano receiver, receives signal up to 10 meters away Power-off capability to preserve battery life 3 different DPI (800, 1200, 1600) for speed adjustment 2 AAA batteries included