Instruction: Answer the given question using the supporting document.

Input:
Question: Do I need to purchase anything additional
Document: I haven't had a chance to use this item yet but did find that other reviews helped in my decision to purchase this item
Item works as described. Who would of thought that I could be so pleased with a lower end ring light that wasn't a Canon. Go figure....really go and figure what else to purchase with he extra money you will save.
This is cheap make. It has been a month and it has stopped working. Lemon or bad quality . I guess stay away...go for canon original. There is no chance of any warranty on any of these Meike flashes unless you purchase from there store. I should have just saved those 129 $s to put into an Canon original....bad idea to get this unit.
If your looking for an inexpensive (not cheap) professional TTL macro flash ring, look no further. For all intense and purpose this is just like the Canon flash ring only much much less expensive. The quality of the Meike MK-14EXT flash ring is superb. I was hesitant in making this purchase because it was coming from China.But it shipped through USPS and got it in 6 working days. It arrived in perfect condition with all the parts well packaged.
I use this for macro photography and it works great. The controls work as advertised and the fit/finish of the flash is very good. It comes with adapter rings to fit most camera lenses so you will not need to buy any accessories. If you plan to use the flash every day you may want to upgrade to the Canon but for less than 1/3 the price this one works for me.
For this price, I can buy three of these flash rings and still come out way ahead.
works as expected, good quality...easy set-up. I am not an expert but I was able to get it working easily...
My only problem is that the flash rotates freely after being attached to the lens. I have to hold it in place while shooting,Is this normal ? I don't know, but it's very inconvenient.
Fantastic item for the price. Well built and solid. This helps out macro photography tremendously. I highly recommend this item.
Love this flash, I had another ring flash and it did not work half as good as this one. I have had a little time to play with it but found it to meet all my needs from macro to portraits.
Answer: You need a Canon DSLR camera that has a hot shoe, you need a lens, and you need four AA batteries. The MK-14EXT comes with the light ring, cable, and the flash controller. It also comes with 7 adapter rings for the following size lenses: 52mm, 55mm, 58mm, 62mm, 67mm, 72mm, and 77mm.