Razer OUROBOROS elite ambidextrous gaming mouse, Customizable ergonomics to fit all hand sizes and grip-styles. 8200dpi 4G Dual Sensor system. Gaming-grade wireless technology with dock. Razer Synapse 2.0 enabled. 11 programmable Hyperesponse buttons. 1000Hz Ultrapolling / 1ms response time. Up to 200 inches per second / 50g acceleration. Approximate Size: 122 mm to 137 mm / 4.80" to 5.39" (Length) x 71 mm / 2.80" (Width) x 42 mm / 1.65" (Height). Approximate Weight: 115 g / 0.25 lbs. (without battery) to 135 g / 0.29 lbs. (with battery). Battery life: (Approx) 12 hrs (continuous gaming). Details