there five air 6, one air base-1, one air remote they all come with digital (up to 192khz) and analogue ins which is an option. mac/pc calibration software, cables manuals... they are in my home studio (non-smoking) since mid 2003. they are in perfect condition. this 5.1 system is perfect for post production - music recording and mixing - film editing - movie soundtrack - dvd authoring and mastering -broadcast - edit suites