With the GC2, you can practice or play golf in any environment with equally trusted results. Outdoors, the portable GC2's exclusive self-leveling technology provides verifiably accurate results on every surface and on every shot. Indoors, the GC2 produces the most accurate measurements of ball characteristics at launch - period. And at less than 10 inches long and under four pounds, the GC2 moves from outdoor to indoor as easily as it fits in your golf bag.