Withings WS-50 Installation And Operating Instructions Manual page 59

3. Tap Update my scale.
4. Press the pairing button at the back of the scale and tap Next.
5. Tap the Smart Body Analyzer you want to update.
6. Tap Upgrade.
7. Tap Close when the upgrade is complete.
Note: You can check which firmware version your Smart Body Analyzer uses in My devices
> Smart Body AnalyzerWireless Scale.
Smart Body Analyzer
EN - 59
v1.0 | April, 2016