Safety: This item is up to nationally recognized standards for high-level electronic safety Fit for Lenovo Yoga 710, 720, 510, 520, 530, 310, 330, C640, Fit for IdeaPad Slim 1, 3, 5, 1-11, 1-14, 1-15, 5-14, 5-15, 5-16, Fit for IdeaPad 100, 100S, 110, 110S, 120, 120S, 130, 130S, S145, S340, S540, S740, C340, L340, Fit for Flex 14, 15, V14, V15, V17, 81WE, 81VS, 81VS, 81CW, Fit for Chromebook N22, N23, N42 Laptop