![First Look: Fitbit Charge 3 Activity Tracker with SpO2 Sensor & Sleep Disturbance Tracking | DC Rainmaker First Look: Fitbit Charge 3 Activity Tracker with SpO2 Sensor & Sleep Disturbance Tracking | DC Rainmaker](https://media.dcrainmaker.com/images/2018/08/Fitbit-Charge-3-First-Loook-Band-720x480.jpg)
First Look: Fitbit Charge 3 Activity Tracker with SpO2 Sensor & Sleep Disturbance Tracking | DC Rainmaker
![First Look: Fitbit Charge 3 Activity Tracker with SpO2 Sensor & Sleep Disturbance Tracking | DC Rainmaker First Look: Fitbit Charge 3 Activity Tracker with SpO2 Sensor & Sleep Disturbance Tracking | DC Rainmaker](https://media.dcrainmaker.com/images/2018/08/Fitbit-Charge3-Optical-Sensor-Swappable-bands.jpg)
First Look: Fitbit Charge 3 Activity Tracker with SpO2 Sensor & Sleep Disturbance Tracking | DC Rainmaker
![First Look: Fitbit Charge 3 Activity Tracker with SpO2 Sensor & Sleep Disturbance Tracking | DC Rainmaker First Look: Fitbit Charge 3 Activity Tracker with SpO2 Sensor & Sleep Disturbance Tracking | DC Rainmaker](https://media.dcrainmaker.com/images/2018/08/2018-08-17-15.43.12.png)
First Look: Fitbit Charge 3 Activity Tracker with SpO2 Sensor & Sleep Disturbance Tracking | DC Rainmaker
![Fitbit Charge 4 updated with features like skin temperature, SpO2 tracker, and more- Technology News, Firstpost Fitbit Charge 4 updated with features like skin temperature, SpO2 tracker, and more- Technology News, Firstpost](https://images.firstpost.com/wp-content/uploads/2020/04/fitbit-charge-4-1280-min.jpg)
Fitbit Charge 4 updated with features like skin temperature, SpO2 tracker, and more- Technology News, Firstpost
![Fitbit Charge 4 update shows SpO2 data on the band itself, tracks skin temperature - GSMArena.com news Fitbit Charge 4 update shows SpO2 data on the band itself, tracks skin temperature - GSMArena.com news](https://fdn.gsmarena.com/imgroot/news/21/02/fitbit-charge-4-update/-476x249w4/gsmarena_000.jpg)