Advantages 1. Ten â??touch points at the same time, infrared sensor technology, with finger touch directly for operation; 2. Strong anti-resistance to light, work directly under sunlight; 3. Multi-touch, intelligent gesture-recognition like zoom in or out the pictures; 4. Module design, simple combination, installation and parts exchange after sale actively; 5. Aluminum NANO surface ,write by normal felt pen ,both normal brush and even wet cloth can clear well; 6. The material is exquisite; adopt the aluminum honeycomb as the basal plate, flatter and more reliable. Make sure the longevity can reach 5 years; 7. USB works as direct power supply, update and data transfer; Specifications Physical Specifications TOUCH SIZE 65inch 70ich 75inch 86inch ACITVE SIZE(mm) 1428.5 x 803.5 1549.44 x 871.56 1649.66X927.93 1897 X 1068 OUTLINE DIMENSION(l*h*w) 1489 x 906 x 103 1611 x 975 x 112 1736 x 1057 x 121 1990 x 1203 x 113 PACKING SIZE(l*h*w) 1620 x 1020 x 220 1811 x 1175 x 235 1920 x 1350 x 280 2150 x 1420 x 330 MOUNTING THINCKNESS(mm) 100 WALL MOUNTING HOLE DIMENSIONS(mm) 400 x 420 STAND OPTIONAL Panel Specification PANEL TYPE Original LED BRIGHTNESS â?¥350 cd/m2 CONTRACT RATIO 4000:1 VIEWING ANGLE 178° RESOLUTION 3840 X 2160 P (4K) LIFE 50000 hours Android System Attributes ANDROID CPU MST 638 A7 4core(828 optional) RAM 1G SYSTEM VERSION 5.1 SPEAKER 2 x 10W @ 8Ω INPUT PORT VGAx1,HDMIx2,USB(2.0)x1, USB(3.0)x1, RJ45x1, SD port x1, Audio x1, RF Inx1, USB type B x1, YPBPR x1, AV in x2 OUTPUT PORT PCaudiox1,RS232X1, TV earphone x1, SPDIFx1 AVout x1, S-video x1 FRONT PORTS PC USB x 2, media USB x1, Touch USBx1, HDMI x1 MEDIA SUPPORT MPEG1 /MPEG2 /MPEG4 /RM /RMVB /H264 /MOV /MJPEG /DIVX /VC1 /FLV /MP3 /WMA /M4A /AAC /JPG /BMP /PNG SYSTEM LANGUAGES Chinese/ English/ Italian/ Spanish/ Arabic