Notice before order1) Parts included: LED module, signal cable between modules, power cable between module and power supply.2) Buy modules of same batch: to avoid brightness&color difference on one single screen, you must buy modules of the same batch. That is, you must buy the modules for one single screen by one order from us.3) Tariff: our price does not include any tariffs or duties at the destination, you should do import customs clearance and pay all tariff or duties locally.Features of  P3.91 Outdoor 250×250 Dual Maintenance LED Display Module: 1) Dual-maintenance, from both the front side and the rear side. People usually use its front maintenance function.2) Easy maintenance, easy to take the modules with a hexagonal screwdriver.3) No screws, easier to take the modules and mount the modules on the cabinet.4) 3.91mm pixel pitch with SMD, perfect solution for semi-outdoor advertising LED screen and outdoor rental LED screen.5) New plastic cover with new mold, smaller module gaps and better screen flatness.6) Reasonable PCB design, reliable and long life time.Applicable situations of  P3.91 Outdoor 250×250 Dual Maintenance LED Display Module: Outdoor LED signs requiring front maintenanceCommercial video screens with small sizesDouble face LED signsSmall LED banner signsOutdoor rental LED screen requiring fast maintenanceParameters of  P3.91 Outdoor 250×250 Dual Maintenance LED Display Module: Module ParameterPixel Pitch3.91mmPixel ConfigurationSMD1921Density65,536 pixels/㎡Module Resolution64pixel(L) *64pixel(H)Module Dimension250mm(L) * 250mm(H) * 18mm(D)Driving ModeConstant current, 1/8 dutyModule MaskPure black mask—high contrast screenElectricity ParameterOptical RatingsBrightness≥6,500 cd/㎡Viewing Angle120°(Horizontal); 120°(Vertical)Best Viewing Distance≥4mGray Grade14 bitsDisplay Color4.4 trillion colorsBrightness Adjustment100 grades by software or automatically by sensorMax. Power Consumption40 WControl SystemFrame Frequency≥60HzRefresh Frequency≥1920HzInput SignalComposite Video, S-video, DVI, HDMI, SDI, HD-SDIControl Distance100M (Ethernet cable);20KM (Optical fiber cable)Support VGA Mode800*600, 1024*768, 1280*1024, 1600*1200Color Temperature5000—9300 adjustableBrightness CorrectionPixel by pixel, module by module, cabinet by cabinetReliabilityWorking Temperature-20～ 60 ºCStorage Temperature-30～ 70 ºCWorking Humidity10%～90% RHLifetime100,000 hoursMTBF5000 hoursContinuous Operating Time≥72 hoursProtection GradeIP65Out-of-Control Pixel Rate≤0.01%