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 StarTech.com NBCOOLER, 2.36" (6 cm), 1900 RPM, 2600 RPM, Black, PU plastic, 10.4" (264 mm) StarTech.com NBCOOLER. Fan diameter: 2.36" (6 cm), Rotational speed (min): 1900 RPM, Rotational speed (max): 2600 RPM. Product color: Black, Material: PU plastic. Width: 10.4" (264 mm), Depth: 12.8" (325 mm), Height: 0.984" (25 mm). Package width: 2.05" (52 mm), Package depth: 16.7" (424 mm), Package height: 11.9" (303 mm). Dimensions (WxDxH): 12.8 x 10.4 x 0.984" (325 x 264 x 25 mm), Package length: 0.657" (1.67 cm), Airflow: 40 CFM https://www.laptopmag.com/reviews/accessories/startech-usb-laptop-cooler If you’ve ever known the literal sting of a notebook overheating in your lap, it may be time to invest in a notebook cooler like the StarTech USB Powered Laptop Cooler (NBCOOLERSE), which can help prevent unwanted temperature rises. It doesn’t cool qui... Small footprint, Quiet fans Doesn’t cool as effectively as competing products, Small number of USB ports, Flimsy cooling vent Small and lightweight, this notebook cooler wicks away heat, but not as effectively as competing devices.