Reference:
VC1280-AT-G
The ATEN™ VC1280 is a user-friendly device that simply connects HDMI and VGA sources to one HDMI display or projector. Apart from being compliant with HDCP 1.4, the VC1280 also supports HDMI 1.4 including 3D, Deep Color and 4K (3840 X 2160@30 Hz). In addition, the VC1280 features built-in VGA conversion, which allows you to transmit VGA signals to HDMI output without using extra adapters or scalers. Supports Auto Switch – the VC1280 automatically switches to a newly plugged-in source. Easily switches sources among 3 modes (HDMI/VGA/AUTO) via a pushbutton. RS-232 Channel Transmission – allows you to connect to serial terminals or serial devices for firmware upgrade.