1.Instant USB Extender: This 4/7-port USB 2.0 hub instantly expands 1 USB port to 7 external USB 2.0 data ports for keyboard, mouse, printer, hard drive, etc. Easily connect up to 7 USB devices. 2.Separate on/off switch: Each port has a separate switch, which makes it easier to turn on/off the USB port instead of plugging/unplugging. Each port's respective LED blue indicator can easily show the working status. Turn off the idle port to save power. 3.The USB interface of the desktop is usually at the back, and it is tiring to bend over to plug and unplug. Connect the USB hub to the back, and we can use the USB device directly in front of the host. 4.Protect the device: Built-in overvoltage/overcurrent/leakage and short circuit protection devices. Designed with a built-in surge protector, it keeps your device safe without the need for drivers. 5.Small and portable: With a thin and light design, it can be easily put into a bag, which is very suitable for business travel or outdoor life.