OBD Power Cable Dual Working Mode
"O" mode:
ACC mode, ACC power on/off button, automatically turns off the power supply after five minutes, and errors may occur on different models, usually around five minutes.
Mode -:
Monitoring mode: When your cars ACC is turned off, the OBD power cable will continue to operate until it detects that the car battery voltage is 11.6V (low voltage), and it turns off after 30 seconds.
The low voltage protection of the mode "-" can protect the car from the impact of the battery, and there is enough voltage to start the car for the next ride in the gear.