Fox addition. All original parts, no mods. No issues. 8s and takes two batteries. Spektrum motor, ESC and servo. Does not come with batteries or receiver. You can use any receiver/ remote pair you have laying around. Its vary big and heavy and extremely fast. Needs lots of room which is why I'm selling it. Cost $1400 new and came with no batteries so i think $700 is a great price. Its not even a year old.