Oscilloscope Kit has been welded when you receive it, just need to assemble the protective case, then you can use it. Designed as a training oscilloscope with simple,reliable and inexpensive circuit. With automatic, regular and one-shot mode, easy to capture the moment waveform. Partially open-sourced,the DSO138 MCU has been programmed. Adjustable vertical displacement,and with instructions,which increase the likelihood of adding different features or developing new applications on the hardware for users.