![Amazon.com: Fitbit Versa 4 Fitness Smartwatch with Daily Readiness, GPS, 24/7 Heart Rate, 40+ Exercise Modes, Sleep Tracking and more, Pink Sand/Copper Rose, One Size (S & L Bands Included) : Everything Else Amazon.com: Fitbit Versa 4 Fitness Smartwatch with Daily Readiness, GPS, 24/7 Heart Rate, 40+ Exercise Modes, Sleep Tracking and more, Pink Sand/Copper Rose, One Size (S & L Bands Included) : Everything Else](https://m.media-amazon.com/images/I/618XT1RvyFL.jpg)
Amazon.com: Fitbit Versa 4 Fitness Smartwatch with Daily Readiness, GPS, 24/7 Heart Rate, 40+ Exercise Modes, Sleep Tracking and more, Pink Sand/Copper Rose, One Size (S & L Bands Included) : Everything Else
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Amazon.com: Fitbit Luxe-Fitness and Wellness-Tracker with Stress Management, Sleep-Tracking and 24/7 Heart Rate, Black/Graphite, One Size (S & L Bands Included) : Sports & Outdoors
![Fitness trackers aren't very accurate at measuring heart rate — and that can be dangerous - The Verge Fitness trackers aren't very accurate at measuring heart rate — and that can be dangerous - The Verge](https://cdn.vox-cdn.com/thumbor/9SFSNq_EQEEfMH5w8sWubWmjqc0=/0x0:2040x1360/1400x1400/filters:focal(1020x680:1021x681)/cdn3.vox-cdn.com/uploads/chorus_asset/file/2447680/DSCF5750.0.jpg)
Fitness trackers aren't very accurate at measuring heart rate — and that can be dangerous - The Verge
![fitbit on X: "Got a Versa 3? Now, you've also got high & low heart rate notifications. Just update your watch in the Fitbit app. https://t.co/kn8Wb2dXiy" / X fitbit on X: "Got a Versa 3? Now, you've also got high & low heart rate notifications. Just update your watch in the Fitbit app. https://t.co/kn8Wb2dXiy" / X](https://pbs.twimg.com/amplify_video_thumb/1408447393453023238/img/zaOErMC2Tb3RNUrz.jpg)