https://www.gladwingroup.com/interactive-led-flat-panel-display-supreme-9-series.php Adopt full aluminium alloy panel structure, anodized surface process, ultra-narrow frame, fashion & beautiful appearance The OPS host module adopts plug structure design, internal Inter standard 80pin interface, without any external power line and signal line, which is convenient for inspection, maintenance and upgrade, and achieves the aesthetic effect of the machine Front side speakers, Prevents noise distortion due to embedding Adopt a high-performance infrared touch technology with anti-blocking and anti-stain functions, and the touch reception will not affect normal writing after blocking at single or multiple infrared transmitting points; interactive led flat panel.