Yeah , they ' re great , I ' d be a little wary though since the ano does tend to come off a bit easier than I ' d like . The 0808 is my beater , the 0450 standoffs have been rotated so the ano that rubbed off is now on the inside <| sep |> Udder ? As in , the place you get milk to make cheese ? <| sep |> The thing is that the optical HR measurement is not ideal when it ' s done while moving so that ' s why there ' s no memory for it in the band in the first place . You ' re not supposed to take continuous measurement with this type of HR monitor . I see a lot people complaining that you need to stop and stand still to take an accurate measurement but that ' s how optical HR meters work . And even if other , more expensive bands can do it , it only tells you how much those companies are using people ' s lack of knowledge of the technology to sell their products at higher price . Optical HR is nothing more than a tiny infrared camera and light the camera looks at your skin and estimates HR on the basis on how much blood passes under your skin . You can even use a regular camera in your smartphone to measure your HR with a proper app . But if you move your entire body while taking a measurement , the accuracy will be off . If you REALLY need to check your HR every 5 seconds , then use a proper chest strap monitor .