Belkin F5U111

Overview
Per catc's source, this device...
 * has a USB ID of 0423:000c (0x0423, 0xC)
 * which is labeled as using NetMate II

Specifications, as provided by Belkin's manual, follow...
 * Data transfer rate: Can exceed 6Mbps (depending on the computer, OS, and communication protocol)
 * Memory size: 32K (8-bit SRAM for IO data buffers), 1024-bit NVRAM for configuration settings
 * Power requirement: 5V, 200mA
 * Dimensions: 4.25" x 3.75" x 1.25"
 * Weight: 3.9 oz

Links of Interest
Manual