True Ergonomic Left Hand Design - The first gaming grade mouse dedicated solely to left-handed professional gamers was conceived because when it comes to it, you want to know you are perfectly equipped with precision and comfort. 3500dpi Razer Precision 3.5G Infrared Sensor - Arm yourself with four times more precision than a standard 800dpi mouse, giving you the edge over the entire competition. 1000 Hz Ultrapolling - Instantaneous execution is guaranteed with the Razer 1000 Hz Ultrapolling technology giving you a response time of 1 ms compared to that of 125 Hz/8ms found in conventional gaming mice.