This is a Hitachi HDD, and the specifications are shown in the image: Model: Hitachi Travelstar 5K500.B — HTS( Phone number appears when clicking the contact button ) Capacity: 500 GB Speed: 5400 RPM Size: 2.5 inches — mostly suitable for laptops Interface: SATA at 3.0 Gb/s Type: Mechanical HDD, not SSD Voltage: 5V / 700mA