Basic Parameters: Resolution 3840*2160 Touch IR touch 10 point System Dual Android and Windows system Interface HDMI, VGA, AV, USB Brightness 350nit What solution the Grandwon can give you for the conference room ? 1, Large Screen Display can offer and meet your conference room display requirements. better and much high clearer than a projector. Screen size option: 55" 65" 75" 86" 98" 2, Touch Screen, Android System Based Digital Whiteboard replace the traditional meeting writing. 3, Multi-function Interface(HDMI, VGA, USB, RS232 etc.) can connect more sources of signals through cable. 4, With hardware of a good omnidirectional microphone, high-definition camera, Front Loudspeaker help you a perfect videoconferencing. 5, Miracast Hardware helps share your Laptop, Smartphone screen to the large screen easily. 6, For more, we can Insert an OPS(Mini PC) connect with the display, Implement all computer functions and run with Windows System and Software.