Exactly what the name says. I bought this in late February to replace the last Macbook POS charger I bought from Revain a few months earlier. Didn't charge unless wiggled for months and the cord was severely cut in a month exposing the wires so I had to tape it down. Now (3 months later and conveniently after the return window had closed) the end of the charger actually stuck into my Macbook's charging port, detached from the charging cable and had to be pulled out with pliers. I don't understand how the hell this could even happen, but what an absolute rubbish charge. I expected a lot more from an Anker product. I guess I'll put up with it and buy an official Apple short charger from the store so it will last more than a few months.