This is a high-quality 5V USB wall adapter that is ideal for supplying power to your LattePanda, Raspberry Pi, Arduino and other 5V devices that require extra current. The higher current will charge devices faster - use it as a fast charger for your smartphone or tablet. This adapter is quality tested and provides a stable 5V without any fluctuation.
What you have seen is a smart plugboard that converted by ESP32 master board and controlled by BLE of ESP32.
Hardware in need: