A:Answer2.4 gHz transmitter
Body span of approx 5"
The best Quadcopter I've found so far BestBuy doesn't carry. I would recommend the Syma x5c-1 and it can be found at ThinkRC.com
A:AnswerWe bought ours in the local Best Buy store. I think if your grandson is gentle and older ( close to a teenager) then it might possibly be enjoyable for him. My boys who are 5 and 9 did not enjoy them. They said they never worked right.
