The XL334P4 docking station is equipped with a standard USB 2.0 interface, with a maximum communication speed of up to 40MB or s. It is suitable for data exchange with most devices that do not require high speed. To protect the equipment, the board is equipped with a 500ma fuse, which is suitable for connecting low-power USB communication devices such as mice, keyboards, USB drives, and microcontrollers. It is not suitable for charging mobile phones or supplying power to high-power fans and other devices. Of course, if you have a certain quantity requirement and do not need fuses, you can replace the fuses with 0805 0 Ω resistors by yourself to cancel the current limiting function of the 500ma fuse. USB file copying speed test (communication speed may be limited by devices such as computers or USB drives, up to 40MB or s). Note:due to different production batches, there are differences in printing screen printing, which does not affect the use. Colour:Black Material:PCB Package Contents: 1 x USB 2.0 Hub Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.