This item is NOT compatible with all WD hard drivesCompliant with serial ata & pata international organization: serial ata version 2.63 slots triple docking (2 x SATA slot and 1 x IDE slot)Supports SATAI/II (1.5G/3.0G) high speedSupports 2x 2.5 & 3.5inch SATA & 1x IDE hard drives simultaneously without any adaptersOffline Hardware Cloning function; Software backup functionSupports One Touch Backup (OTB) functionSupports one-button disk copy (clone function) Supports USB 2.0 hi-speed (480Mbps) and full-speed (12Mbps) operationHot swappable for most operation systems (Win 98/ME/2000/XP/Vista/Win 7, Mac OS 9.X/10.X, Linux)Plug and Play; 12V 5A external power supply2 ports USB 2.0 HubMS/M2/XD/CF/SD/TF card readerSpecification: HDD supported: 2.5 /3.5 SATA, STAT II, IDE HDDHDD capacity: Up to 2TBInterface: 1 x XD, 1 x MS, 1 x SD, 1 x CF, 1 x M2, 1 x TF, 1 x USB 2.0, 2 x USB HubPower supply input: 100~240V, 50~60hzPower supply output: 12V, 5APlug standard: Type B (as shown in the pictures) OS supported: Win 98/ME/2000/XP/Vista/Win 7, Mac OS 9.X/10.X, Linux; Color: Black and RedProduct dimensions: 137x134x66mmProduct weight: 302g Weight: 750g (with package) Dimensions: 16.2 x 15.3 x 12.3 cm (with package)Package: 1 x SATA IDE HDD Docking1 x Power Supply1 x USB Cable