Manufacturing SUNIX (Reference UTM1925C). With Prolific PL2303HXD 16C550 UART Compatible chipset. Plug and play, does not require IRQ, DMA or I/O address (system assigned IRQ & IO). RS232: FIFO 16 byte Hardware. RS-232 signals: DCD, TxD, RxD, RTS, CTS, DTR, DSR, GND, RI. Transfer rate of 50bps ~ 120Kbps. Data bit 5, 6, 7, 8 / Stop Bit 1, 1.5, 2. Parity even, odd, none, mark, space. Flow Control None, Xon/Xoff, RTS/CTS. ESD protection: ±15KV ESD. DB9 male connector. PARALLEL : SPP mode (for printer only). ESD protection: ±2KV ESD. DB25 female connector. Drivers for Microsoft Windows 98/ME/2000/XP/2003/Vista/8/10. Server 2008/2012/2016/2019, Mac OS Yosemite/Mavericks/Mojave/High Sierra/Sierra/El Capitan/ CATALINA . Standards: CE, EN55022 Class B, EN55024, EN61000-3-2, EN61000-3-3, FCC Part 1