How to buy a USB hub

USB is the abbreviation of Universal Serial Bus in. Hub uses a star topology to connect multiple USB interface devices.

A USB Hub can be connected to computer desk lamp, computer fan, MP3, USB Flash Drive, voice recorder, digital camera, etc. It can expand one USB interface into multiple independent working USB interfaces. It is directly connected to the computer, no external power supply is required, easy to use, the computer automatically recognizes and installs without driver, plug and play freely and easily.

USB2.0 or USB3.0?

The theoretical maximum transmission speed of USB2.0 is 480Mbps, providing 500mA current power supply, while the theoretical speed of USB3.0 can reach 5Gbps, providing 900mA current power supply. Popular point is that USB3.0 is faster than USB2.0 charging/transferring speed (ten times). In addition, USB3.0 is backward compatible and supports USB2.0 devices. So if you consider the transmission speed, USB3.0 is definitely a better choice. Operating System support: Win95/98/Me/2000/XP, Linux2.4andMac os8.5 or above.

Regarding the 2.4G wireless mouse/keyboard receiver problem, it is true. USB3.0 will cause interference while working with wireless devices. Some users choose to use 5G wireless, and some take a USB2.0 extension cable that exceeds 1 meter to keep the device away from the computer and so to reduce interference, but the hub manufacturer will circumvent these problems or reduce the impact during the design.

Advantages of external power supply

In the process of connecting multiple external devices, a simple insufficient power supply will cause the device to be unable to read the data, and sometimes may cause data recording errors, hard disk damage, and scrap. The hub with independent power supply can provide more power to drive the equipment and ensure normal operation, and it will also extend the lifespan of the equipment.

Computer USB interface:

USB2.0 interface: 5V 0.5A (500mA) 2.5w

USB3.0 interface: 5V 0.5A (900mA) 4.5w

This requires attention to the attached power parameters when purchasing an external power hub, to ensure that the interface can reach a power of 2.5w.


  1. More extended interfaces are not always the better, choose according to actual needs, the interface distance should be reasonable, not too close and too far;
  2. The hub is made of ABS and aluminum alloy. Aluminum alloy is relatively more wear-resistant and anti-drop, but the price will be higher;
  3. The indicator light can show the operation of the equipment, so it is recommended to choose a hub with indicator light;
  4. Cable length specifications meet different needs: long cables are applied to desktop computers to avoid bending and unplugging. The short cable is suitable for synchronous debugging of notebook devices or data transmission. It also helps the desktop not to be messy and improves work efficiency.

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