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SIGMA - Germany Klauss-Pete Schendel's company that first started to produce computers for bikes "Cyclocoach" in 1983. In 1988 they expanded their production with microeletronis and started to manufacture headlights and backlights that are powered with batteries. After that their success was widened with MTB lights. In 2000's Sigma introduced watches with wireless connection.
Nowadays watches and bike computers are so developed that it can be charged with USB cable, can monitor heart rate and has GPS navigation system.
