Measures Tempo, Rhythm, Length, and Club head Speed. Tests consistency. Using three internal sensors, the Suunto G6 measures each stroke???s tempo, rhythm, length, and clubhead speed. Practice sessions records 100 swings with swing variation and deviation. Tests your consistency for ten consecutive swings. Keeps stats and scorecard on the green. Dual-time, day/date, alarm, stopwatch. Optional upgrade kit available, includes PC Interface and cable to download sessions and graphs. Material: Aluminum / Black Elastomer (Also Model: Suunto SS011740310)