Signal only transmits from VGA to HD which only converts from VGA (analog signal output ) to HD (digital signal input).
IMPORTANT NOTE: This adapter CAN NOT be used as a HD-to-VGA converter. Please know that the product is not defective! It's just only work for VGA to HD!!! Please be aware before ordering!!! Portable VGA-to-HD Adapter/Converter easily hook up old computer/laptop with VGA output to new TV monitor or projector with HD input for video streaming game playing screen mirroring or extending. VGA output/HD input supports support video and audio synchronously video resolution up to 1920x1080@60Hz (1080P full HD) transmit stereo sound of the video via the 3.5 mm aux jack. Plug and Play but the micro USB port MUST be connected to get power for the build-in active VGA-HD chipset (not working at all if not connected). Compatible with Windows 7/8/10/11 Linux OS operating system. Package included a 15 pin D-sub (VGA) to HD adapter a 3.5 mm jack Audio Cable and Micro USB Power Cable. If the product you received did not work or suddenly stop working please contact us immediately via Message to get refund or replacement! Herfair offers 30 days free return and 18 months warranty to all our products!