Feature • USB 3.0-5gbps ultra-high-speed transmission,1 USB 3.0, 1 type c 3.1 and 1 4k HDMI female expansion port, meet the transmission, charger requirement. •could connect with plenty of USB and charging to MacBook. •type-c upper and lower end interface is exactly the same, don't have to distinguish the USB data interface between positive and negative. you can plug in both directions. •transmits high-definition audio and video from computer or tablet to HDMI display for streaming and gaming with resolution up to full aperture 4k(4096×2160) / 2160p (4k) ultra HD. also, supports 1080P, 720p, 480p and other. *compatible with HDMI 1.4 and former versions as well as HDMI audio •support device: MacBook (USB type-c) OS X system,chromebook pixel •note: please plug in again if product appears unstable. •package inclued: •1X type-c charging hub •how to connect •step-1: connect USB type-c connector of the adapter to any •USB type-c HDMI mode supported devices •step-2: connect HDMI output of the cable to HDTV or HDMI enabled •display using standard HDMI media cable note all connected USB devices should not exceed a combined input current of 900mA, otherwise output current may become unstable or disconnect. devices are usually rated as follows: mouse 100mA, camera 300mA, keyboard 500mA, and external hard drive 900mA. 2.4 GHz wireless devices, MIDI devices and some USB 3.0 devices may not be supported. the hub not support cell phone for HDMI display connection, and it only support computers use mac OS X, chrome OS and windows. attention: if you encounter it cannot auto detect your monitor after you connect the HDMI port, for windows 7/8.1/10, you may click into control panel- appearance and personalization- display- adjust/screen resolution, then you click detect, following the system indication.