A gaming mouse's sensor is the number one hardware component that determines how well a mouse performs in games. The sensor decides the mouse's tracking speed and accuracy, two factors we scrutinize in our tests. The main spec to look for in any sensor is dpi (dots per inch), which tells you how well the mouse's sensor reports movement per inch of physical movement. The newest wireless gaming mice have dpi ranging from 12,000 to 30,000, with higher numbers indicating mice with greater sensitivity. While a lot of fuss is made about dpi in manufacturer brochures, there's really no perfect dpi for gaming, it being largely a personal choice. While it can't hurt to have the best, unless you're a professional esports gamer you probably won't need a 30,000 dpi sensor. In reality, even 12,000 dpi provides decent performance in games.