You start the stress tracking session, with your hand touching the electrodes on the watch face. This estimates sweat production in your skin and takes it as a stress indicator.įitbit’s Sense and Charge 5 have 'first generation' EDA tech, which needs active participation to work. The Sense 2 offers the company’s once spotlight-grabbing EDA sensor. The clearest new feature for the Fitbit Charge 6 is one introduced in the Sense 2. However, we do think the wireless connections this watch uses will be the same as those of the Fitbit Charge 6.

The FB423 could be a Charge 5 that uses some different wireless chips. It suggests Fitbit may simply have switched to a slightly different formulation of Charge 5 late last year, around when the Versa 4 and Sense 2 arrived. The “FB423” assignation this device has in the FCC’s files is also mentioned in the latest version of the Fitbit Charge 5 manual. However, there is a complicating factor here. This is exactly what we’d expect the Charge 6 to have, largely because it’s what the Charge 5 has too. These documents suggest the Fitbit Charge 6 has NFC, GPS with GLONASS, and Bluetooth Low Energy, but no Wi-Fi.

All gadgets sold legally in the US end up on the Federal Communications Commission database, which records the wireless communications standards they use. (Image credit: Ida Blix) Fitbit Charge 6: No Wi-Fi, but it does have the restĪ Fitbit watch believed to be the Charge 6 has also gone through the FCC process, as highlighted by NotebookCheck (opens in new tab).

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