Indoor Rental IRS Series Rental LED Display IRC Series P2.5mm,480mm*480mm cabinet P3mm,576mm* 576mm cabinet P4mm,512mm* 512mm cabinet P5mm,640mm* 640mm cabinet Black SMD LEDs Contrast: 8000:1 Easy Installation Spring Lock Connection design with micro-adjustment. Stable & Reliable High Precision Die-Casting Aluminum Light weight Urtra-Thin Die-casting Cabinet Quality  Materials Strong Cabinet Full Black and Mat LED lamp to ensoure high contract ratio Good ventilation Design Reliable stainless locks. Seetronic or Nertrik Connectors Easy  Maintenance Double protection against Bump Quick replacement of all the parts Cover protection for all LEDs