After the vehicle is turned off, the device does not power off/disconnect automatically.

Regarding the issue that the CP82 (U2-Air Pro) does not power off/disconnect automatically, please refer to the following official guidance:

The CP82 is a Car Adapter-type in-vehicle adapter. Once it is plugged into the vehicle's USB port and powered on, it enters a continuous standby state designed to stably provide the wireless CarPlay conversion service. Therefore, the device itself has no “auto power-off” logic in the traditional sense. As long as the vehicle's USB keeps supplying power, the product will keep working. If you want the device to stop working or disconnect from the phone while the vehicle is not turned off, you can do the following:

1. Turn off the WiFi and Bluetooth functions on your phone. This ensures that the device will not maintain a connection or wake up automatically; to reconnect, simply turn on the phone's Bluetooth and WiFi functions, and the device will restore the connection automatically.

2. If you do not want to turn off the phone's Bluetooth and WiFi functions, the only option is to unplug the device from the vehicle's USB port; to reconnect, simply plug it back into the vehicle's USB port, and the device will restore the connection automatically.