![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-Sensors.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-Charge-3-First-Loook-Band.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-Gorilla-Glass-3.jpg)
First Look: Fitbit Charge 3 Activity Tracker with SpO2 Sensor & Sleep Disturbance Tracking | DC Rainmaker
![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/-728x314/gsmarena_000.jpg)