1. Interface: 2 internal SATA interfaces, 1 ATA133 interface, 2 external ESATA interfaces (external ESATA and internal SATA can only use 2 at the same time, select by jumper, the default is 2 internal SATA interfaces). 2. Support 0, 1, 0 + 1 mode, support JBOD. Comply with PCI-Express 1.0 standard, PCI-Express speed is 2.5/s full duplex channel. 3. The driver supports 2000 / xp / 7/8 / server 2003 / xp 64 bit / Vista, , Dos. 4. Supports Ultra 133 hard disks, and supports Ultra 100/66/33 standards downwards 5. Support 1 external ESATA interface and 1 internal SATA interface, transfer rate up to 3Gb/s, and support SATA 1.0 standard. specification: array: support 0, 1, 0 + 1 mode, support JBOD Transmission rate: 133MB/sec, ATA133 Chip: JMB363 Support capacity hard disk (48-bit mode): 137 GB or more One IDE interface: supports up to 2 IDE devices Material: PC+metal colour: Black Package Contents: 2 x Express Expansion Card Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.