1. Why Need It -Directly exchange data between 2 different type HDDs(SATA and IDE), even for different size(3.5" and 2.5") of HDD. You can copy or back up your files conveniently. No need buy 2 or more external cases. 
2. How Easy -Only need one step, you can change HDD(2.5" or 3.5") to HDD(2.5" or 3.5") without screwdriver, and Stand next to you PC or Notebook. No more need open the external case and remove several screws. 
3. High Capacity HDD Compatible -You can install maximum 2X2TB hard drive at the same time. Give you much convenience for data exchange and backup. 
4. Special design for IDE hard drive. Now your old IDE/PATA hard drive could work for you again. 

Features: 
1. Hold maximum 2X2TB hard drive at the same time. 
2. Compatible with 2.5"/3.5" IDE/SATA hard drive 
3. Directly exchange data between 2 different size and different type HDDs 
4. Easily transfer data from your 2.5"/3.5" IDE or SATA hard drive to your computer through USB 2.0 and eSATA port. 
5. Integrates all-in-1 card reader(XD Card/TF Card/MS(Duo/Pro) Card/CF Card/SD Card) 
6. Integrates 2 USB ports 
7. Data transfer speed 
8. USB2.0: up to 480Mb/s 
9. eSATA: up to 3Gb/s 
10. Hot-Swap capability for rapid multi HDDs access & exchange 
11. No need add enclosure or open case with screwdriver. 
12. Compatible with all 2.5" or 3.5" IDE and SATA I/II hard drive up to 4 TB(4000GB, 2X2TB) capacity 
13. Plug & Play,LED indicator 
14. Compatible with Windows 98/SE/ME/2000/XP/Vista/7,Linux, Mac OS 9.x or above