With the advantage of USB port, users have the capability to utilize the peripheral with serial port interface in an easy to use environment such as plug and play amp; hot swap function. This adapter is designed for ideal connections to Cellular Phone, Digital Camera, Modems or ISDN terminal adapter with over 120k bps data transfer rate. System Requirements : Windows 2000 / XP / VISTA / win 7 Mac OS 8.6 or above Versions Package Contents : Package Type : Blister Dimension : 68 x 55 x 22 mm USB to Serial Adapter (DB9) x 1 USB Type A Male to Type B Cable x 1 CD-ROM (Driver and User Guide)