Features: 1. Plug and play, easy to use 2. Made of high quality material, durable in use 3. Can expand your system and storage capacity with an additional hard drive  4  Modular construction, you can just remove the CD driver and put this in the slot 5. Fast & reliable connection in laptop, just as the primary HDD Specifications: Compatible with: ACER 4741 4741G 4551G D640   Package included: 1 x HDD Connector