High-speed transmission:SuperSpeed USB 3.0 enables data transfer rates of up to 5Gbps, downwards compatible with USB 2.0(high-speed 480 Mbps) / USB 1.1(full-speed 12 Mbps) standards. The actual transmission speed subjects to the setting of the device connected. Simultaneous use:Support 2 IDE and 1 SATA hard drives connecting simultaneously! Compatible with two IDE hard drives simultaneously, If not, Please set the 3.5'' IDE to be the slave drive based on the instruction on the hard drive. Convenient to use:Hard Drive Adapter Plug and Play, Hot-swappable, no driver needed. On/Off Switch design for HDD protection. Led light shows power and activity status. Intelligent Backup:One Touch Backup (OTB) Function. Design for people who need to backup data from your computer to portable hard drive. (Please install the included OTB Software CD. OTB function doesn't work for Mac OS and Linux). High compatibility:Connect your SATA / IDE device to your computer as an additional external hard drive via USB 3.0. Compatible with 2.5"/3.5" IDE/SATA hard drives and DVD-ROM, CD-ROM, CD-RW, DVD-RW, DVD + RW Optical Drive. Compatible read up to three hard drives simultaneously.