Please note :

1: This is not Mini Displayport but the newest USB 3.1 Port !

2: Please check whether your phones supported this function !

3: please make sure your smartphone or tablet come with DP ALT Mode(Like lumia 950/950XL) ! 

VERY IMPORTANT ! 

Only compatible with USB-C Smart Phones & Tablet Which with DP Alt mode Type C (USB-C) Smart Phone can work mostly with MHL mode solution or SlimPort solution 

Features :

Support USB Type C input and HDMI output

Supports video resolutions up to 3840x2160@60Hz

Support Up to 32 audio channels for a multi-dimensional immersive audio experience

Support Up to 1536kHz audio sample frequency for the highest audio fidelity 

USB Type C connector : 

Support for DisplayPort 1.2 Alt mode

Plug & Play Installation（with）No Driver （and） No External Power Required

Can withstand 10000 times repeated plug 

Convert your cellphone signal to HDMI

3D Compatible & HDMI Ethernet Channel

Compatible with HDMI projector monitor TV and other large-screen display equipment 

High Definition Audio support :

High Definition Audio support for a full range of audio types, including SACD, DVD-Audio, DTS-HD Master Audio, and Dolby TrueHD. Compatible with USB Type-C DP Alternative Mode specifications for video. 

Best Heat Dissipation with Aluminum Housing :

Poweradd houses the two connectors with ideal thermo conductivity material - aluminum, ensure long time working without overheating