One Way Direction--The HDMI to VGA cable is only support one way from HDMI to VGA transmission.It is NOT bi-directional. It can not be used for vga to hdmi. NOT Compatible With Low Power HDMI Devices--The cable chip requires sufficient power from output HDMI port.So it does not support for Apple Mac systems and Blu-ray players.【NOT compatible with all Apple devices, Macbook, Sony Devices [PS4] and Blu-ray players.】 HDMI to VGA Display Adapter Cable--Transport video from HDMI compatible device (compatible with Laptop,PC, Xbox,DVD,TV Box,Nintendo Switch,Roku,Chromebook,Chromecast,Amazon fire TV, PS3) to a monitor or projector with VGA port to enjoy HD video in large screen without extra HDMI or VGA cable needed.