1. The input circuit is equipped with over - voltage and short - circuit protection functions. When the input voltage is higher than 5.6 - 5.8V, the input power supply is automatically cut off to protect the base and the controller. When an output short - circuit fault occurs, the internal self - recovery protector also activates the protection function and automatically resumes normal operation after the output short - circuit fault is eliminated. 2. Two high - speed fans are built - in to accelerate the air circulation inside the PS4 console for heat dissipation purposes. 3. It has 10 drive bays. 4. It is powered by the two USB ports on the PS4 console, eliminating the need for an additional power adapter. There is also a USB charging expansion port on the base, which solves the problem of insufficient USB charging ports. 5. It can charge two original PS4 controllers simultaneously. The controller icons on the front display mirror turn red when charging and turn green when the controllers are fully charged or when there are no controllers being charged.