Gaming grade optical sensor- High speed motion detection at 37ips and acceleration up to 15g- Resolution up to 1,600- Frame rate up to 4,000fpsErgonomic DesignDS B1 ergonomic design to enhance the comfort of the user while using mouse and to help prevent serious injury from long-term daily computer use.Anti-Slip SurfaceFeaturing side Anti-Slip grips, ensure the prefect grip and you never loss of mouse control again.Weight SystemDS B1 comes with eight 2 gram weights to suit variety of games. Customize the perfect weight for a perfect feel.Gold-plated connectorGold-plated USB connector with rubber sheathed cable.