Product DetailsUSB to 4 Serial Ports 3.5” Hub with MCS7840 chipset Product Specifications• USB to 4 Serial Ports 3.5” Hub with MCS7840 chipset • USB 2.0 device controller • On-Chip USB 2.0 PHY • On-Chip voltage regulators • Four 16C450/16C550 compatible UARTs • Supports RS-232, RS-485 and RS-422 serial ports • 5, 6, 7 & 8-bit serial data support • Hardware and software flow control • On-chip 512-bytes FIFOs for upstream and downstream transfer • On-chip buffers for serial port signal • Two wire I2C interface for EEPROM • Two Bi-directional multi-function GPIO lines • Dimension: 7x6x1.5 Inch • Weight: 10 Oz • UPC: 810154014354 System Requirement • Hardware: Computer with USB Port • Windows 2000/Server 2003/XP/Vista/Server 2008/7 (32-bit and 64-bit) Included 1 x USB to 4 Serial Ports 3.5” Hub 1 x USB Cable 1 x User Manual