The perfect four-port Baseus hub will allow you to increase the number of ports on your computer or laptop. It ensures constant and fast data transmission, and due to its high-quality materials, it is resistant to minor mechanical damage and scratches. The micro USB port is used for external power supply for devices requiring more stable and higher voltage. 
You can use four ports at the same time. It allows access to additional ports. So you can connect multiple devices at the same time without worrying about insufficient inputs on your computer or laptop.