![The Whoop 4.0 fitness tracker measures SpO2, pulse and more as a bracelet or in special clothing - NotebookCheck.net News The Whoop 4.0 fitness tracker measures SpO2, pulse and more as a bracelet or in special clothing - NotebookCheck.net News](https://www.notebookcheck.net/fileadmin/Notebooks/News/_nc3/Ars_Technica_Whoop_4.0_Announcement_1_800x600.jpg)
The Whoop 4.0 fitness tracker measures SpO2, pulse and more as a bracelet or in special clothing - NotebookCheck.net News
![Amazon.com : WHOOP 4.0 with 12 Month Subscription – Wearable Health, Fitness & Activity Tracker – Continuous Monitoring, Performance Optimization, Heart Rate Tracking – Improve Sleep, Strain, Recovery, Wellness : Sports & Outdoors Amazon.com : WHOOP 4.0 with 12 Month Subscription – Wearable Health, Fitness & Activity Tracker – Continuous Monitoring, Performance Optimization, Heart Rate Tracking – Improve Sleep, Strain, Recovery, Wellness : Sports & Outdoors](https://m.media-amazon.com/images/I/71CQ6esBqFL._AC_UF1000,1000_QL80_.jpg)
Amazon.com : WHOOP 4.0 with 12 Month Subscription – Wearable Health, Fitness & Activity Tracker – Continuous Monitoring, Performance Optimization, Heart Rate Tracking – Improve Sleep, Strain, Recovery, Wellness : Sports & Outdoors
![Amazon.com : WHOOP 4.0 with 12 Month Subscription - Wearable Health, Fitness & Activity Tracker and Ultra-Soft SuperKnit Accessory, Heather : Sports & Outdoors Amazon.com : WHOOP 4.0 with 12 Month Subscription - Wearable Health, Fitness & Activity Tracker and Ultra-Soft SuperKnit Accessory, Heather : Sports & Outdoors](https://m.media-amazon.com/images/I/81sOHR1tKIL._AC_UF350,350_QL80_.jpg)