Razer Naga MMO PC Gaming Mouse (Certified Refurbished) This Certified Refurbished product is manufacturer refurbished, shows limited or no wear, and includes all original accessories plus a 90-day warranty 17 MMO-optimized buttons (including 12 button thumb grid) 5600dpi Razer Precision 3.5G Laser Sensor 1000Hz Ultrapolling / 1ms response time Razer Synapse 2.0 enabled