The device cannot connect automatically; I have to connect it manually every time.

Regarding the automatic connection to CarPlay mode, you can find the option “Auto-connect to CarPlay and Android Auto” in the settings of the Multiplay app and set it to “On”. In this way, when the phone connects to the Ai-Box Bluetooth, it will automatically jump to the Multiplay interface and connect to Apple's wireless CarPlay or Android's wireless Android Auto.

If you need to turn off automatic connection, you can refer to the following video tutorial: https://youtu.be/ps9616LggaE

The specific steps are: turn off the Bluetooth on your phone, and then open Multiplay on the Play2Video Pro. There is a settings button in the upper-right corner of Multiplay. After opening the settings, you can turn off the automatic connection to CarPlay.