The Aztech Systems Ltd. Modem Card MDP3999V-U(B) is a PC Card Type I modem designed for desktop computers. It features two ports for external DSL/Phone connections and supports various standards such as V.42, ITU-T V.92, K56Flex, and V.42bis. With a maximum data rate of 56 KBps, this modem card is an ideal addition to enhance your computer's connectivity capabilities. Made in China, this Aztech modem is compatible with PCI ports and offers reliable performance for your networking needs.