This high-tech 80-Compression multi-layer ball is air cannon tested to ensure that it is as durable and powerful as name- brand golf balls. You will get as much distance and accuracy as you will from a pro-line ball. It also meets the official size and weight standards of the USGA. But there is a difference. The Twilight Tracer has the added benefit of broadcasting an automatic, laser flash a split second after each contact with your club. The flash sequence pulses at 7.2 flashes per second, and lasts for five minutes, plenty of time to spot your shot on the course (or in the rough).