This is a Type-C to USB 3.0 with HDMI and Type C charging port hub. 
The USB 3.0 port allows you to connect a USB device to a host computer or another hub, the USB-C female port can charge for the host computer, and the HDMI port ( DP Alt mode ) allows you to connect an extra monitor so that you can watch videos or slideshows on a big screen. 
It can work on Macbook or Google new Chromebook Pixel and other Type-C supported devices. 
Features:
1.3-IN-1  Type C male to type C / HDMI / USB adapter cable 
2.Support HDMI resolution up to 3840 x 2160 ( 4K ULTRA HD SUPPORTED ) 
3.Support USB 3.0 super speed ( 5Gbps ) transmission, downward compatible USB2.0 
4.USB-C female charging port for Macbook or Google new Chromebook Pixel and other USB-C supported devices charging 
5.Multiple USB-C interfaces support plug and play, hot swap, easy for carrying 
Specifications: side 1( input ): USB 3.1 type C male 
Side 2-1( output ): type C female 
Side 2-2 ( output ): HDMI female 
Side 2-3( output ): USB 3.0 Female