DECISION REVIEW SYSTEM (DRS) IN CRICKET
DRS is a technology-based process for assisting the match officials with their decision-making.
Technologies used in DRS are Television Replays, Ball Tracking technology used to track the path of the ball, Microphones, Snickometer, Infra-Red imaging to detect temperature changes as the ball hits the pad or the bat.
Under this, on-field umpires may consult with the third umpire (an Umpire Review) and players may request that the third umpire consider a decision of the on-field umpires (a Player Review).
Recently, rules under DRS have been updated by International Cricket Council.