AC input 100-240V for worldwide compatibility. Over voltage/ Over current protection. High temperature protection, Low ripple operating noise, high gloss Casing.NOTE: Please check your laptop model no. before purchasing: This is only compatible with 13" MB-Pro without HD display and MB-Unibody (Mid 2010 and Late 2009). NOT COMPATIBLE WITH: MB-Air 11/13 and MB-Pro With HD Display. WORKS WITH: MB Pro (13-inch, Mid 2012), MB Pro (13-inch, Late 2011), MB Pro (13-inch, Early 2011), MB Pro (13-inch, Mid 2010), MB unibody (13-inch, Mid 2010), MB unibody (13-inch, Late 2009), Unibody MB (Mid 2010), Unibody MB (Late 2009). NOT COMPATIBLE WITH: MB Air 11/13 and MB Pro With HD Display