To resolve the error message with a red wrench and a -5 showing on your VeryFit watch, follow these steps:

1. Restart Your Watch: The first step is to power off the watch completely. Once it is off, turn it back on. This can often reset minor issues.

2. Check Battery Level: Ensure the watch has enough battery. If the battery level is low, charge your watch until it is adequate.

3. Reset the Watch: If the error persists after restarting, perform a factory reset on your watch. The steps to do this vary by model, so refer to your specific model's manual for instructions.

4. Remove from App: Open the VeryFit app on your smartphone and remove the watch from the device list.

5. Re-pair the Watch: After removing it, go to the Bluetooth settings on your phone and ensure that Bluetooth is enabled. Then, re-pair your watch with the VeryFit app.

6. Check Bluetooth Connection: Make sure your smartphone is successfully connected to the watch via Bluetooth. If there's any issue, try reconnecting or troubleshooting your smartphone's Bluetooth settings.

7. Firmware Update: Verify that your watch's firmware is up to date. In the VeryFit app, check for any available updates and install them.

8. Consult Support: If all else fails and the error is still showing, contact VeryFit customer support or consult the user manual for further troubleshooting steps.

By following these steps, you should be able to resolve the error message on your VeryFit watch - learn more.