Features: brand new and high quality If the user's machine has no optical drive, floppy drive, or a laptop with a USB interface, connect the laptop hard disk to this transfer card and install the system on the desktop computer. The notebook hard disk adapter card is used to connect the notebook hard disk to the IDE interface of the desktop computer through the adapter cards. It can be used as a desktop hard disk and copy data between the desktop computer and the notebook hard disk. (Convert 2.5-inch hard disk interface to 3.5-inch hard disk interface) Please note that the interface cannot be reversed. The side with the sticker label of the hard disk must face the side with the words on the card, so as to avoid failure and burn the disk. Correct connection method: Align the front of the notebook hard drive (the side with the sticker) with the front of the card (the side with the indicator light). If the reverse connection indicator is not on, please turn off the power immediately and reconnect correctly Note: The power must be connected Ensure adequate power supply. Specifications: Type : 3.5 to 2.5 "44 pin to 40 pin IDE hard drive adapter Material: PCB Size: approx. 8.4x3.3cm/3.31x1.3in Note: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package includes: 1 x 3.5 IDE to 2.5 IDE Adapter Card