Boost your serial port throughput to 115,000 bps or 230,000 bps with no additional hardware required. It works with the enhanced serial ports (on most Power Macintosh and Macintosh "AV class" computers) to boost your serial port speed. Your existing applications can use SerialSpeed 230 to speed their operations. They'll talk to your modem or printer 200% or 400% faster than before!