Automatic, manual, and preset tuning Two-way RS-232 serial port connection Direct frequency access via remote and RS-232 Thirty station presets, switchable to eight for quicker scrolling Forced Mono operation for mono zones Remote handset assignable up to four different zones Automatic on/off by 9 - 12 V trigger, with looping output Fully remote controlled with discrete on/off commands Rear panel infrared remote input and looping output Gold-plated RCA output jacks Multi-region European operation Voltage switchable between 115v and 230v Unique half-rack width chassis; 1 rack space high Fastening hardware available for rack mounting