Supports 3KV optical Isolation, 15KV ESD protection and 600W surge protection | Requires no IRQ, DMA, I/O port. | Virtual COM port drivers available for Windows 10, 8.1, 8, 7, Vista, 2003, 2000 | Dimensions: 192.42 x 122.22 x 23.60 mm (LxWxH), dimensions are to DIN rail(W), to power plug(L) | Genesys GT852G 4-port USB 2.0 hub chip