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Timex TMXM640 Specs
The very best way to ensure you're getting the correct specs is to download the owner's manual which should contain all the information you need, including full specifications of your Timex TMXM640.
Check to make sure the brand and model listed below are correct, then download the manual in order to gain access to all the specs.
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This is for my Timex TMXM640 specs. If my Heart Rate Monitor specs are unavailable then please, by all means, contact us at FindMySpecs.com.