The cuff does not fit small to medium arms. It is 32 - 42 cm (12.6" -16.5"). The box says 22 cm - 32 cm for average size arms. My wife has small arms at 23 cm And mine are 28 cm, so the provided cuff doesn't work. I like the device though. Clear numbers and it talks. So I'll try finding a 22 - 32 cuff like mentioned on the box.
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