Do not buy from this seller.I bought this item to do my job and I really needed it! I returned it to the seller and I explained exactly what was the defect. They promised to send a functional replacement and when I received it I found out it was the same exact item with the exact same defect. 8 keys of the alpha-numeric keyboard did not work at all, again.The help I received from Amazon was awful as well as the help I got from the seller.