Cable was Type C port Video output to Mini DisplayPort Port Cable?so the source has to be the USB-C.?. Can't Reverse Output,Please use the USB-C port connect your laptop/iPad, and the Mini DisplayPort port connect the display (Unidirectional transmission ONLY).PLUG & PLAY: plug auto-recognition,no-need Driver, plug auto-recognition.video output up to 4K@60Hz. High-Definition: (Can't Data transfer,only Video output,CAN'T use for Dock,hub,docking station) Audio and video synchronous transmission, high-definition display as 4K / 3840x2160 @60Hz, transmission speed up to 5.4 Gbps.[Not Compatible with Thunderbolt 2 Cable or Device] GOOD QUALITY: Nylon braided cable not easy to bend knotted, resistant to dirt, abrasion, durability. The aluminum alloy casing greatly reduces the resistance and provides the highest quality transmission speed. WIDELY COMPATIBLE: Compatible with Thunderbolt 3 (Not Comapatible with Thunderbolt 2) to Mini displyport.This Type C to Mini Displayport cable works