Features:           Host device clock auto range: 2.5 MHz - 8 MH           Fast master <-> slave communication          Automatic restart after power failure          Automatic ATR setup          Optical isolated(*) and breakable slave units to use 5 wire flat cable          Each host device can be switched on/off without disturbing other ports operation          Fast cascaded operation(*)          New: Firmware change/upgrade          New: Combined 5-in-1 slave          Mature and reliable