Key Features ? 75" ultra-HD display ? Metal housing, 4mm AG anti-glare tempered glass, and ultra-thin and ultra-narrow appearance ? IR (Infrared Ray) touch technology, supports 20 points writing. ? Writing height below 2mm to bring smoother writing experience ? All-channel annotating, built-in Android writing software ? Smart sidebar menu ? Wireless screen sharing, convenient to presentation ? Built-in Android system and optional with Pluggable PC Module ? Double LAN bridging, supporting Android, Pluggable PC Module (Windows system) and external PC realize network bridging ? Public USB port auto switch ? Antenna hidden inside ? All channel can be loop-outed by HDMI