1.To use the HDMI output port, the host USB-C port from your device must support DisplayPort Alt Mode. 2.To power and charge a connected USB-C laptop, the host USB-C port from your device must support USB Power Delivery 3.This hole is not an indicator Product Features: 1. Comply With Type C Interface Specification, Both Forward And Reverse Insertion Can Be Used 2.HDMI-compatible: 4K 30HZ Is Backward Compatible With 1080P, 720P, etc 3.USB: Up To 480M (One port is USB 2.0,the other one is USB 3.0,but only can work with Hard driver) 4.PD Charging: Up To 87W Fast Charge 5.Type C Female: 5V 500mA~900mA 6.SD/TF: USB 2.0 7.RJ45:10/100M 8.Packing Size: 17*7*1.5cm 10.Product Material: Aluminum Alloy