{"product_id":"strykr-smart-ring-hartslag-zuurstof-en-slaaptracker","title":"STRYKR Smart Ring – Heart Rate, Oxygen and Sleep Tracker","description":"\u003cp\u003eA watch for your finger. This ring measures your heart rate, blood oxygen, steps and sleep, and puts it all in an app that shows how you are doing. No screen, no notifications, no subscription.\u003c\/p\u003e\n\u003ch2\u003eWhy a ring instead of a watch\u003c\/h2\u003e\n\u003cp\u003eYou do not feel it while you sleep and it does not get in the way during pull-ups, boxing or lifting. Because there is no screen, the battery lasts days instead of hours. You charge it in the little dock that comes with it.\u003c\/p\u003e\n\u003ch2\u003eWhat you do with it\u003c\/h2\u003e\n\u003cp\u003eCheck in the morning whether you have actually recovered before you plan a hard session. See whether that late night wrecked your sleep quality. Track your resting heart rate over weeks and watch your fitness build.\u003c\/p\u003e\n\u003ch2\u003eChoosing your size\u003c\/h2\u003e\n\u003cp\u003eMeasure the circumference of your finger with a piece of string or a strip of paper. Size 7 is roughly 17.3 mm across, size 12 roughly 21.4 mm. Stuck between two sizes? Take the larger one, a ring that pinches is a ring you will not wear.\u003c\/p\u003e\n\u003ch2\u003eShipping and delivery\u003c\/h2\u003e\n\u003cp\u003eShipping to the Netherlands, Belgium, Germany and Austria in 12 to 20 working days. See \u003ca href=\"\/en\/pages\/verzending-en-levering\"\u003eShipping and delivery\u003c\/a\u003e or the \u003ca href=\"\/en\/collections\/ai-tech\"\u003eAI \u0026amp; Tech collection\u003c\/a\u003e.\u003c\/p\u003e","brand":"STRYKR","offers":[{"title":"Maat 7","offer_id":53435399962890,"sku":"CJYD235397705EV-7","price":59.95,"currency_code":"EUR","in_stock":true},{"title":"Maat 8","offer_id":53435399995658,"sku":"CJYD235397705EV-8","price":59.95,"currency_code":"EUR","in_stock":true},{"title":"Maat 9","offer_id":53435400028426,"sku":"CJYD235397705EV-9","price":59.95,"currency_code":"EUR","in_stock":true},{"title":"Maat 10","offer_id":53435400061194,"sku":"CJYD235397705EV-10","price":59.95,"currency_code":"EUR","in_stock":true},{"title":"Maat 11","offer_id":53435400093962,"sku":"CJYD235397705EV-11","price":59.95,"currency_code":"EUR","in_stock":true},{"title":"Maat 12","offer_id":53435400126730,"sku":"CJYD235397705EV-12","price":59.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0950\/9781\/5306\/files\/75efc1cf-399f-4b84-bdeb-fca14d6287a6_trans.jpg?v=1785143749","url":"https:\/\/strykrstore.com\/en\/products\/strykr-smart-ring-hartslag-zuurstof-en-slaaptracker","provider":"STRYKR","version":"1.0","type":"link"}