Products trademarked iTEKIRO are marketed and sold exclusively by EPMUSA at Amazon.com. When attached to the electrical outlet, this laptop AC adapter ultrabook charger powers your laptop and charges your ultrabook battery whether your laptop is on or off. Input: AC 100 ~ 240V / 50 ~ 60Hz, worldwide compatible; Output: 19VDC 2.1A-2.37A, 45W Max (Replacing 40W genuine adapter); Dimensions: 3.74" x 1.69" x 1.10"; Weight: 6.0 oz (2-prong power cord excluded). Please note this adapter is not original, it is a replacement made by iTEKIRO. Your purchase of this adapter comes with 100% satisfaction of 90-day money back guarantee and 1 year replacement warranty, plus a complimentary 10-in-1 USB charging cable for most smart phones, cellular phones, E-Book readers, GPS, MP3 / MP4 players, and digital cameras.