This is Controller/PCB (Printed Circuit Board) for 3.5" 

Western Digital My Book.

This board is used, tested and in great working condition. 

Converts SATA HDD into USB 2.0 interface.

PART NUMBER

4060-705014-003 REV. A- Printed on the board

4061-705014-103 REV. AB - on the barcode sticker.

4061-705014-   FIREFLY 1U / 1B - on the board

 Photos of the actual item are provided.

I-201