Based on the previous model, it is equipped with a Da Yi A3 base input, suitable for adjustable boost and buck modules of the same size. The power supply interface is reserved. It also includes a Da Yi A3 battery interface and a DC5521 female connector. The KD01 ship-type switch has three pins and two switching modes to switch between battery power and external power supply. The output interface includes two banana sockets and a DC5521 female connector.