it all goes through your iphone, no hand held device. it's awesome, set you throw back speed of catcher down a bit so it doesn't track the throw back and have the catcher not rocket it back. It's a nice tool
My wife wakes me up at 5 am this morning to tell me that I have an email stating they are not selling them. She wanted to know if I wanted 1 ball or 2. Needless to say she had purchased them before I ever got out of bed.
I wish they had more than a 4 year shelf life but I think the price makes up for it. I would have thought it would have been more expensive. $79.99 every 4 years is not bad IMO.