Specifications:Power:- Output voltage: 19.5 V- Power plug: Plug with a pin in the middle. Outer diameter 4.5 mm, inner diameter 3.0 mm, length 12 mm- Compatibility: Dell Vanue 11 PRO series (7140), XP more→S 18 series (1810), Interchangeable with: 0VRJN1, 227372-134, VRJN1,