My HRM didn't come with extra calibration straps (strap extenders) so it was incredibly small! I'm 5'6", 130, wouldn't consider myself tall and I was choking on this HRM. The questions below the item says it comes with extra straps, but I didn't get the extra straps. I returned it , I have received confirmation from Amazon that they will be replaced and again received the HRM without the adjustable straps, Everything Deals customer service told me it is one size which is clearly not true as this band probably unsuitable for most adults without extensions Warning buyers!
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