This retractable USB cable adapter is very fast, high speed charging and fits several different sizes of phones or tablets for your charging pleasure. It is retractable which makes it very easy for storage, take with you when you travel, go on vacation or to the office or classroom. Easy to use and easy to store. We were very impressed with the speed at which this charging cable charged up our devices. It is adaptable and suitable for several different devices as well as sizes of phones and tablets. Pleasure to use.