1. The whole machine adopts integrated DLED backlight, and the details of the direct light-emitting picture are more delicate and realistic; 2. Matrix layout lamp beads, high permeability DLED lens, backlight is more in line with visual perception; 3. Integral backplane heat dissipation, large heat dissipation area and space, low shell surface temperature; 4. Tempered glass screen printing black edge 23.8MM; 5. Ultra-thin front frame, the thinnest part is only 14.5MM; 6. Front frame aviation grade aluminum, sandblasted; 7. The tempered glass edge of the front frame is chamfered with diamonds; 8. The whole machine is all hardware structure, which is solid and integrated, safe and anti-theft, and anti-damage; 9, dedicated commercial display DLED back shell design, perfect match profile frame; 10. The 100-ton stamping of the hardware backboard ensures the firmness of the fuselage and shows the curved surface arc; 11. OD20 mixing distance, make the body as thin as possible; 12. High-transparency display tempered glass; 13. The front of the front frame profile is extremely narrow, only 0.8MM; 14. Distribution line, AC socket and boat switch; Model MGAD550 Dimension 1261(L)*731.8(W)*21.5MM(H) Size 55 inch Touch panel 10 point capactive touch screen display area 1213.1(H)*683.2(V)MM Screen contrast ratio 16:09 Brightness 300cd/㎡ Contrast ratio 1400:01:00 color 10-bit backlight uniformity 75% Backlight type DLED backlight  view angle 178°(V)/178°(H) Resolution 1920*1080 / 3840*2160 4K optional Service life (hrs) 60000(hrs) Backlight current and voltage 100-165V/600mA Tempered glass/silk screen black edge width 3MM/12.9MM Packing size 1350*156*827MM Net weight 27KG Gross weight 29KG VESA Mount 400*400MM