Ultra HD display with up to 3840 × 2160 resolution of input signal available. 20px ultra fine writing, and 2 mm diameter recognizable with the precision of 1 mm. Built-in Wi-Fi projection without any cable connection. Built-in interactive whiteboard system allows annotating and sharing by QR code. Looping-out display available. Various audio and video interfaces for device access. Built-in network switch chip saves a network switch. Built-in Android system provides kinds of applications. Compatible with OPS/OPS-C devices, realizing smooth switch between built-in systems.