The all new Fly Sky GT3C 2.4ghz transmitter is equipped with loads of new features. New and improved power system features a 3.7v Lithium Polymer battery for longer run times and gives the user savings on purchases of AA batteries. Well all know those AA batteries drain out way too fast! A feature we really like is the scroll/select button for quicker selection of the menus and settings. The large LCD screen is easy to read and allows the user to quickly set parameters.