Reolink TrackMix WiFi Manual page 5

Step 5. Select a WiFi network, enter the WiFi password, and tap Next.
Step 6. Scan the QR code on the app with the camera lens.
Tap Scan Now. The QR code will be generated and displayed on your phone. Please hold your phone
in front of the camera at a distance of about 20 cm (8 inches) and have the phone face the camera
lens to let the camera scan the QR code.
After you hear the beep sound, tick "I have heard a beep sound from the camera" and tap Next.