The Blue Charm case adopts a real tool-free design, and users can remove the screws that fix the case cover by hand. After using this design, many cases began to declare themselves as "tool-free" designs. In fact, you still need a screwdriver to install the CD-ROM drive and hard disk. BenQ easily installed and removed the hard disk and CD-ROM by hand through the gadgets in the above picture. The humanized design of Blue Charm chassis is also reflected in the connectors inside the chassis, such as USB interface, which provides integrated interface and separated connector. If the definition of USB port on the motherboard is consistent with its integrated interface, you can use this connector directly. If not, it doesn't matter, you can use the separate connector provided by it. Blue charm cabinet comes with ATX3000-65PA power supply produced by Shanghai Yuli Electronics Co., Ltd. and supervised by BenQ Dentsu Information Technology Co., Ltd. Its rated power is 250 watts and its peak power is 300 watts. From the nominal point of view of each DC output terminal, the index of this power supply is average, but it can fully meet the needs of most home users.