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 联想 Tab E7 , 17.8 cm (7"), 1024 x 600 像素, 16 GB, 1 GB, Android 8.1 Oreo, 黑色 联想 Tab E7 . 显示器尺寸（对角长）: 17.8 cm (7"), 显示器分辨率: 1024 x 600 像素. 内部存储容量: 16 GB. 处理器频率: 1.3 GHz, 处理器系列: Mediatek, 处理器: MT8321A/D. 内置存储器: 1 GB. 后置摄像头分辨率（数字）: 2 MP, 前置摄像头分辨率（数字）: 0.3 MP. Wi-Fi标准: Wi-Fi 4 (802.11n). 辅助GPS功能（A - GPS). 集成读卡器. 重量: 271.7 g. 已预装操作系统: Android 8.1 Oreo. 产品色彩: 黑色