1、Adopting structure simplifies design, reduces the use of case space, and reduces logistics and warehousing costs. 2、Host control IC adopts for Skyworth GL3520, which can extend 4 high-speed USB0 interfaces. 3、The data transmission speed is fast, the highest transmission rate can reach 5Gbps. 4、Support shutdown charging function, can be down compatible with USB0 and USB1 version of the device. 5、Reasonable layout, ensure that each device can be inserted properly. Features: Adopting structure simplifies design, reduces the use of case space, and reduces logistics and warehousing costs. Host control IC adopts for Skyworth GL3520, which can extend 4 high-speed USB 3.0 interfaces. The data transmission speed is fast, the highest transmission rate can reach 5Gbps. Support shutdown charging function, can be down compatible with USB 2.0 and USB 1.1 version of the device. Reasonable layout, ensure that each device can be inserted properly. An auxiliary power supply interface is added to meet the demand of charging high-current devices and mobile phones. It is used to reserve the front I/O interface of the computer chassis with 3.5-inch floppy drive, which is convenient for multiple USB 3.0 devices to be connected at the same time, and transmit data signals at high speed. Specifications: Material: Nickel plating+Gold plating Size: Approx. 14.8* 9.9* 4.2cm/ 5.83* 3.90* 1.65inch Color: As is shown on the photo Model: 4071-3007 Type: Soft Drive Front Panel Interface: 4*USB 3.0 Cable: Approx. 60cm / 23.6in Holder: Sand Blasting Thick Iron Frame Package list: 1 x Panel 2 x Connect Cable 1 x Screw Bag Note: Please correctly distinguish between the size of the host optical disk driver and the floppy disk drive, the optical disk driver is generally located at the top of the host position, floppy disk drive location is generally located in the middle of the host, otherwise it will not be able to install normal use.