RoHS stands for Restriction of Hazardous Substances. RoHS, also known as Directive 2002/95/EC, originated in the European Union and restricts the use of specific hazardous materials found in electrical and electronic products (known as EEE). All applicable products in the EU market after July 1, 2006 must pass RoHS compliance. The substances banned under RoHS are lead (Pb), mercury (Hg), cadmium (Cd), hexavalent chromium (CrVI), polybrominated biphenyls (PBB), polybrominated diphenyl ethers (PBDE), and four different phthalates (DEHP, BBP, BBP, DIBP). RoHS Viewsonic IFP5550-E1, 55", 350 cd/m², 3840 x 2160 pixels, 1200:1, 8 ms, Multi-touch Viewsonic IFP5550-E1. Display diagonal: 55", Display brightness: 350 cd/m², Display resolution: 3840 x 2160 pixels. Operating system installed: Android, Processor frequency: 1.2 GHz. Subwoofer RMS power: 15 W. Ethernet LAN data rates: 10,100,1000 Mbit/s. HDMI version: 1.4/2.0