Material: aluminum alloy color: deep space grey input ports: double type-c ports, male output ports: type-c (female)*2; hdmi*1, usd3.0*2 type-c 1 thunderbolt supportive of thunderbolt3 (40gb), type-c data (5gbps), pd charging, video (supporting 5k video output) type-c 2 data type-c (5gbps) usb3.0 transmission rate 5gbps, downward compatible with usb2.0 and usb1.1 total output of usb1, usb2 5v/1.2a type-c pd input supporting 5v/9v/14.5v/20v 3a(max) operating voltage dc5v~20v static power consumption <5v 180ma (power consumption of this device) operating current 220~3000ma supported system mac os sierra, etc. supported device macbook pro 2016/2017