True Ergonomic Left-Hand Design For all the left-handed gamers out there, your long hours of using gaming mice that do not fit are over. With the Razer DeathAdder Left-Hand Edition, Razer is covering new ground. The first gaming grade mouse dedicated solely to left-handed professional gamers was conceived because when it comes down to it, you want to know you are perfectly equipped with precision and comfort. 3500DPI Razer Precision 3.5G Infrared Sensor The 3500DPI Razer Precision 3.5G infrared sensor arms you with 4x more precision than a standard 800DPI mouse giving you the edge over the entire competition. 1000Hz Ultrapolling Rate Instantaneous execution is guaranteed with the Razer 1000Hz Ultrapolling technology giving you a response time of 1ms compared to that of 125Hz / 8ms found in conventional gaming mice. TECH SPECS Ergonomic left hand design 3500DPI Razer Precision 3.5G infrared sensor 1000Hz Ultrapolling / 1ms response Five independently programmable Hyperesponse buttons On-The-Fly Sensitivity adjustment Always-On mode Ultra-Large non-slip buttons 16-bit ultra-wide data path 60–120 inches per second and 15g of acceleration Zero-Acoustic Ultraslick mouse feet Gold-Plated USB connector Seven-Foot, lightweight, braided fiber cable Approximate Size : 127 mm / 5.00” (Length) x 70 mm / 2.76” (Width) x 44 mm / 1.73” (Height) Approximate Weight: 148 g / 0.33 lbs System Requirements PC / Mac with USB port Windows® 8/ Windows® 7 / Windows Vista® / Windows® XP (32-bit)/ Mac OS X (v10.6-10.7 and above) Internet connection (for driver installation) At least 35MB of hard disk space Razer Synapse 2.0 account registration (requiring a valid e-mail address), software download, license agreement acceptance, and internet connection is required to use full feature set of product and to receive updates.