Compatible with Dell WD15 Monitor Dock 4W2HW 450-AFGM Dell Business Dock - WD15 K17A001 RD43V 452-BDDU Dell Business Thunderbolt Dock - TB16 K16A001 2PMR2 452-BCNP Dell Thunderbolt Dock WD19TB K20A001 9GMPM 210-ARIK Dell Docking Station - WD19 KXFHC 210-ARIQ Dock WD19S K20A Input:100-240V 50-60Hz Output:19.5V-9.23A Watts: 180 Watts(Aslo Compatible With 19.5V 6.7A Watts: 130 Watts)Connector Size: 7.4 X 5.0(mm) 【Multiple Protection】Built with Industry grade materials and premium circuitry, Internal smart circuit keeps you and your device safe with multiple protections, including over current protection, over voltage protection, short circuit protection, over heating protection, overload protection, surge protection and under voltage protection,Safe and secure Safety - All of our product lines are put through rigorous quality control procedures to ensure safe, reliable operation for years to come. In addition, our products are in compliance with top industry standards, and include numerous safety mechanisms, including protection against short circuiting, overvoltage, overcurrent, and internal overheating. Package Contents: 1 x power adapter, 1 x high-quality AC cable .30-Day Money Back Guarantee and 12-Month Product Replacement