... to 4 Ports RS232 Serial Card, 64 Bit, 2000 V Surge Protection,UK Chip Features:Plug and PlayAdopt RS232 serial port ... than 900 KBPS data throughput, top efficiency gradeSupports 2000 V surge protectionSupports 256 byte FIFO drivers and hardware and software flow ... to 4 Ports RS232 Serial Card, 64 Bit, 2000 V Surge Protection,UK Chip