My boyfriend bought me this for my Canon t5i and I love it. It's useful and convenient to have when your trying to photograph babies. It comes with a little pouch that you can attach to the camera strap for easier access. It has a little switch on the back of it, one for a 2 second delay and the other for an instant pic. It says that it does not come with a battery but mine did which I thought was odd but I still bought extra just in case. It requires C2032 battery, Best Buy does sell them. I do wish the range was further than 10ft but I would still recommend the product.
For those who don't know how to set it up, its very simple. Just go onto your DSLR setting, the option where it give you to either select to take a single photo, multi-photos, self-timer, etc your going to select the one that has a little remote with what it looks like a Wi-Fi symbol.
Once that's all done, just point it on the side of the camera sensory and you're good to go.