Interface 4xUSB2.0 ,1x10/100M self-adaption RJ45 interface ,1xUSB2.0 OTG, 1xaudio port Touch screen High quality capacitive touch screen Serial ports 2xSerial ports OS Android 4.2.2/ Android4.4.2 Camera Built-in 2,000,000 pixel TF Card Yes Microphone Built-in Frequency Built-in 2W loudspeaker Built-in (optional) 2xUSB2.0, POE power supply, keyboard port, 4xI/O ports, 1xI2C, LVDS port Audio Out 0.5W(MAX) (optional) 1080P/ 3D video output Support Power ≤7W EPA VESA ON,OFF,SUSPEND, STAND BY, 75*75mm, 100*100mm Video format(1080P) WMV,MKV,MOV,AVI,RM/RMVB,MPEG-2/4. Audio format MP3,WMA,3GP,AAC,FLAC,WAV.OGG Base Plastic/ Metal base(optional) http://www.ksaiandroidpos.com