The XL334P4 docking station is equipped with a standard USB 2.0 interface, with a maximum communication speed of up to 40MB/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 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/USB drives, up to 40MB/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 * 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.