Three connectors: One IDE 44 Pin connector for internal 2.5 inch HDD; One IDE 40 Pin connector for internal CDRW, DVDRW, CD Rom, DVD Rom, COMBO DRIVE etc; One SATA connector for SATA devices.; Hi-Speed USB interface provides for easy installation with its plug and play design.; External AC power (not included) input 90v-264v needs to be used to supply power to SATA/IDE device.