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22 of 22 people found this helpful
Not compatible with Ironman GPS
on June 29, 2011
Despite some of the other reviews that seem to imply this works with many watches this item is not an ANT+ compatible sensor and will not work with the Timex Ironman GPS watch nor the Timex Ironman Triathalon. Amazon is working with me on the return. And Timex responded with an e-mail that affirmed it is not Ant+ compatible.