ASUS C23-UX21, UX21 SERIES, UX21 ULTRABOOK SERIES, UX21A ULTRABOOK SERIES, UX21E, UX21E ULTRABOOK SERIES, UX21E-DH52, UX21E-DH71, UX21E-KX001V, UX21E-KX002V, UX21E-KX004V, UX21E-KX004X, UX21E-KX007V, UX21E-KX008V, UX21E-KX008X, UX21E-KX009V, UX21E-KX010V, UX21E-KX011V, UX21E-KX013V, UX21E-KX013X, UX21E-KX014V, UX21E-KX016V, UX21E-KX020D, UX21E-KX128, UX21E-SH52, UX21L SERIES, ZENBOOK UX21, ZENBOOK UX21 SERIES, ZENBOOK UX21A, ZENBOOK UX21A SERIES, ZENBOOK UX21E, ZENBOOK UX21E SERIES