YENKEE External power supply.

Built-in surge protection. 4-Port USB 3.0 HUB with Super Speed data transfer up to 5Gbps and micro USB input for external power supply. The USB Hub adds 4 USB ports to your PC, allows you to connect additional devices such as mouses, keyboards, external hard drives, flash drives, etc. HUB can be used as multiple USB charger with max. charging current of 2.4A on a single USB port if additional power supply is used (not included). Charging and data transfer works simultaneously, thus you can conveniently fast-charge your mobile device while continue using your other USB 3.0 peripherals. HUB supports hot swapping and thanks to built-in surge protection keeps your devices and data safe. Specification:
Upstream port: 1x USB 3.0 Type-A
Downstream ports: 4x USB 3.0
Data transfer rate: up to 5 Gbps
Ext. power input: microUSB DC5V / 2A (max.)
Power output: DC5V / 2.4A (max. on single port)
Cable Length: 120cm
Dimension: 72 x 42 x 11mm
Power adapter is not included. System requirements:
USB port
Windows 7/8/10
Mac OS X
Linux 2.6.14 or above