... and teaching efficiency.LED touch screenModel: SY-TVAI-03Size(Inch): 55Screen Type: LEDContrast Ratio: >=5000:1Color: 10bit, ... Input Port: VGA,AV Audio Frequency,S-Video,Ypbpr,TV,HDMI,USB,RS232 Intelligent Control(Optional)Output Port: ... 16M SATA3 Blue Dise(Desktop model 3.5 inch)Memory: DDR3 1333 2G(2G Memory one piece ... Microphone: 1setInteractive Whiteboard Software CD: 1pc Touch TV for Education