TypeSATA 7+15 extension cord sata power cord.One side is the male head the other side is the female head now many hd players have a connected SATA interface you can use this wire directly connected to the device and the hard disk.SATA data line +SATA power line two lines into one.UsageExternal hard disk data transmission.ApplicationUsed for SATA serial port hard disk and SATA optical drive as well as other SATA interface equipment.