This is a high-performance replacement laptop charger for the Contax U4RBK, guaranteed to meet or exceed the OEM specifications of your original. The laptop charger is 10.1 x 5.9 x 2.2 inches. Manufactured by Empire Scientific, model number VBC-276P. We offer a 1 Year Warranty with purchase. See this product elsewhere at a lower price? Call or email us; we have a Price Match Guarantee.