Check the listing for details. FitTrack Smart Full Body Composition SCALE The Dara BMI Digital Bluetooth White. Color: White, Condition: Open box. Listed at 34.02 USD. FitTrack Smart Full Body Composition SCALE The Dara BMI Digital Bluetooth White. ITEM SHOWN, IS THE ITEM YOU WILL RECEIVE. PLEASE SEE ALL PHOTOS FOR DETAILS BEFORE PURCHASING. App Instructions: The scale can be used with Hume or TrackFit. TrackFit is a relaunched old version, the data display is simpler and clearer, while Hume is the new version, which can use a premium program within the app for those who are looking for coaching and deeper personalized insights. And you do not need a premium feature to use the app. Can more than one person use it? Sync up the scale with different devices in the household. Error Messages on the Scale Display: ERR:Indicates scale overload. ERR1:Indicates failure in measuring body metrics. Possible reasons: Wearing socks during body metrics measurement. Please measure barefoot. Failure to connect to the application. TrackFit App Bluetooth Connection Instructions: Ensure that your device's Bluetooth function is turned on. Turn on your electronic scale. Launch the TrackFit application. Go to "Me," click on "My Devices," then click the plus icon at the top right. The app will start searching for nearby devices and initiate connection. Once successfully connected, your scale will appear in the "My Devices" list. Return to the app's homepage, where "Connected FitTrack" will be displayed at the top. Troubleshooting Bluetooth Connection: If the app fails to find the device, stand on the scale to weigh yourself, then try searching for the device again. If the device is already added to "My Devices" but "Connected FitTrack" is not displayed on the homepage, return to "My Devices" and click "Sync the device."