Rollei Actioncam 550 Touch User Manual page 12

Control
This allows user to set the microphone volume, Speaker volume, LCD Brightness.
Sounds
Turns sound of Shutter, Boot-up, Beep OFF or ON.
LDC
To correct the distortion of the wide-angle lens.
FOV
To set the lens wide angle, Super Wide, Wide, Medium, Narrow.
Power Frequency
Selecting the correct light frequency will avoid the possibility for strobing.
WIFI
Selecting to turn on or turn off the Wi-Fi function.
RF
Turn OFF or turn ON the remote control function.
Date & Time
This allows user to adjust the date &time.