This document is the user manual for B-CONTROL DEEJAY BCD2000 version 1.0. It provides important safety instructions and instructions for using the power switch. It warns users not to open the machine cover to prevent electric shock and fire hazards. It also mentions the installation requirements of the machine and precautions for the usage environment. It provides instructions for handling abnormal situations. Users are advised to refer to the accompanying operating and maintenance instructions, as well as the dangerous voltage parts inside the machine.