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The adjustable, elastic strap on the Flex Tech Digital 2.4 has a digital transmission that eliminates cross-talk and interference, allowing you to concentrate on your training and your accelerated heart rate.
Digital transmission - Cancels out cross-talk - Eliminates interference Adjustable strap fits most body types Machine-washable strap - Makes cleaning easy ANT+™ technology wirelessly syncs with compatible watches - M229, M536, M843, M844 Owner replaceable battery
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