On the QR790 this allows the WIFI to switch off automatically after you drive off, you can set the time in the settings. Or you can switch off the WIFI completely which I won't advise, the middle indication light shows when the WIFI has switched off with a chime indication as well. I manage to get the following information from the Korean head office regarding all the chimes. The chimes you hearing is from my dash cam's built in ADAS 2.0 (Advance Driving Assistance System). Here is the list of sounds and different meanings. 1.) Tin tin tin tin, tin tin tin tin (LDWS - Lane Departure Warning) 2. Ding Dong (FCWS - Forward Collision Warning) 3. koo koo (FVSA - Front Vehicle Sensor Alarm when standing still movement detected from either car in front moves off or pedestrians crossing) 4. TIRURU (WiFi Off - Within 5 minutes of turning on the car) 5. Taramm WiFi On - Automatically when starting the car) 6. Tin Tunn (Event/G-Sensor - Sensitivity can be changed).