<Li> Ultra-edge, which is termed as Hot Spot's enhanced version of Snickometer When the ball has hit the batsman / batswoman' s pads, Ultra Edge creates four frames and automatically uses all the frames to give precise result . It is able to differentiate more clearly over sounds created by bat, pads or clothing . </Li> <Li> Hot Spot: Infra - red imaging system that shows where the ball has been in contact with bat or pad . Improved cameras were introduced for the 2012 season . </Li> <Li> Real - time Snickometer, which uses directional microphones to detect small sounds made as the ball hits the bat or pad . </Li> <P> Each team may make no more than two unsuccessful review requests per 80 overs during a Test match, and no more than one unsuccessful review request per innings during a One Day International . A fielding team may use the system to dispute a "not out" decision and a batting team may use it to dispute an "out" decision . The fielding team captain or the batsman / batswoman being dismissed invokes the challenge by signalling a "T" with the arms . Once the challenge is invoked, acknowledged, and agreed, the Third Umpire reviews the play . Additionally, at their discretion, field umpires may request the Third Umpire to review certain close calls such as line calls (to determine run outs and stumpings), boundary calls (to see if a batsman / batswoman hit a four or a six), or for close catch calls where neither umpire is sure if a catch was made . A challenge is only used in situations that did or could result in a dismissal: for example, to determine if the ball is a legal catch (making contact with the batsman / batswoman' s bat or glove and not touching the ground before being held by a fielder) or if a delivery made the criteria for a leg before wicket dismissal (hitting the ground in line or on the off side and hitting the batsman / batswoman in line with a path that would have hit the wicket). The Third Umpire then reports to the on - field umpire whether his analysis supports the original call, contradicts the call, or is inconclusive . The on - field umpire then makes the final decision: either re-signalling a call that is standing or revoking a call that is being reversed and then making the corrected signal . Each team can initiate referrals up to the limit on unsuccessful reviews . </P>

Who is the first batsman to be given out using drs