Including OPS PC, including a slim one machine interaction, support multi-point operation, before the two-tone aluminum shell and a rounded design to make it not only looks beautiful, elegant, refined and can provide protection for safety. Its unique touch screen and front down the front maintenance port allows maintenance becomes convenient, self-developed specialized educational software and multi-language support for it in used in education, business meetings and other machine industry occupies a unique advantage. Screen display parameters LCD screen size 55inch (diagonal) effective display area 1209.6mm (W) x 680.4mm (H) aspect ratio 16: 9 Brightness 400cd / m (center point, typical) contrast ratio 4000: 1 Backlight Type LED Maximum Viewing Angle 178 ° (V) / 178 ° (H) (typical) Best Resolution 1920 * 1080 Video format PAL / SECAM output 2X10W audio input port (1080P) high-frequency interface * 1, AV Input * 1, YPbPr * 1, USB * 2, HDMI * 4 output ports AV output * 1, VGA output * 1, AUDIO (3.5mm earphone) * 1, USB * 1 (touch only), * 1 coaxial audio output * 1 USB playback format Front down front interface port interface supports full-format audio, video, pictures, etc., including USB TOUCH * 1, HDMI input * 1, PC USB * 1, the source and touch support front interface access after automatic switching function . Key 8 Keys Key (7 key TV + 1 key PC), can achieve a key switch PC and TV, and can be individually switch TV, PC switched on the next key switch backlighting saving total power switch located on the lower edge of the machine before position sensor remote control receiver * 1, PC status * 1, TV * 1, * 1 induction blackboard stop light intensity sensor * 1 USB port at the top of the top of the interface is reserved and mounting platform (optional) touchscreen technology of infrared multi-scan technology Touch the type of 1:00, 2:00, 4:00 infrared touch touch embedding pre-embedded (can before maintenance) touch-driven approach to avoid flooding the writing surface material HID physical 4MM tempered glass (optional antiglare) touchscreen induction method fingers, pen , gloved hand or other non-transparent touch-sensitive media 4096X4096 resolution touch touch screen positioning system communication port USB2.0 response speed sampling rate ≥120Hz click: 8ms continuous: 3ms positioning accuracy ≤ ± 2mm interference Incandescent (220V, 100W ), the vertical distance 350mm above the illumination of sunlight shot 90000Lux calibration calibration-free (support WIN7 comes calibrated and manufacturers supporting the program than the standard procedure) multi-touch 2:00, 4:00 touch independent writing more than 60 million times in the same position touches System Power Supply USB 5.0V power directly support the operating system Windows, Linux, Android, MAC detection support comes with software detection, the test equipment can be good or bad. Remote upgrade features support for touch hardware remote control program (MCU) upgrades.