Notice:The graphics card interface must support HDMI 2.1 version to achieve 4K/120HZ refresh rate 1. 4K@120Hz HDMI dummy plug High refresh rate is a display emulator (virtual plug), after connecting Headless Ghost, your operating system will detect a virtual display and enable GPU, and this virtual display has the same function as real display. 2. GPU hardware is often disabled until a monitor is connected, resulting in poor performance and limited resolution for remote users to work on. 3. When the GPU is enabled, various tasks can be performed, including high resolution and refresh rate enabling hardware to accelerate GPGPU operations such as remote desktop and cryptocurrency mining, and the resolution supports 800x600@60/120HZ-3840x2160@60/120HZ. How can it help you? 1. Solve the problem of black screen/white screen/low resolution when the remote desktop has no monitor. 2. Solve the problem that the graphics card stops working for no reason when mining. 3. Solve the problem that the remote resolution is low and cannot be operated. 4. Can turn off the display to remotely operate the computer. 5. Compatible with Windows 11/10 /8.1 /8 /7 /XP, MAC OS, Linux, etc. 6. Support:3840*2160@60/120Hz, 2560*1600@60/120Hz, 2560*1400@60/120Hz, 1920*1200@60/120Hz, 1920*1080@60/120Hz, 1680*1050 @60/120Hz 1600* 900 @60/120Hz, 1440 *900@60/120Hz ,1366*768 @/12060Hz ,1360*768 @60/120Hz ,1280*1024 @60/120Hz ,1280*800 @60/120Hz Notice:4K resolution simulation requires HDMI 2.0 ports, RX460, GTX1050 or above (only supports single-computer graphics cards, not integrated graphics computers), and the resolution exceeding the GPU cannot be simulated. Quantity: 4K@120Hz HDMI dummy plug 1 packCraftsmanship: Gold-plated HDMI interface guarantees complete signal transmission, provides 2 years unconditional warranty, if you have any questions, please feel free to contact us, we will reply in the shortest time. Compatibility: Applicable to any discrete graphics card, notebook with HDMI output,Support PC Windows, Mac Mini OSX, linux, and other operating systems. ideal for game streaming, VR,and the use of Mini server with screen sharing, etc. Easy to use :Plug & Play-No drivers,no software, no powered,Support hot swap.Low power consumption.Guaranteed stability for cryptocurrency mining, video rendering, and simulation mirroring. Advantage : Makes computer run "headless",low cost to replace expensive real display, energy saving,environmental.protection.is server and colocation farms, SOHO and home servers and remote-deployed headless PCs best solutio. Function:4K@120HZ HDMI dummy plug Can enable the PC to enable the GPU to create a virtual display to perform tasks,Simulate high resolution for remote control,Up to 4K@60HZ/120HZ, compatible with 1440@60HZ/120HZ,1080P@60HZ/120HZ, etc.(Notice:The graphics card interface must support HDMI 2.1 version to achieve 4K/120HZ refresh rate).