BBestlap Lap Timer Racing Lap Timer Motorcycle Racing Lap Timer Infrared Ultrared Xt Aim Compatible ReviewbP PP Bestlap Lap Timer Racing Lap Timer Motorcycle Racing Lap Timer Infrared Ultrared Xt Aim Compatible PThis bidding comes with the transmitter and the timer(without battery on the transmitter due to shipping policy).PAn infrared lap timer will count the lap time for you at 0.02slap accuracy which is 30 times as accurate as human hand.PIt is a complete set of Ultrared Lap Timer that is exactly the same system as UltraLap Mini but with completely new design and workmanship.