Proto Max 4 ch Radio Control Helicopter Want something more than a beginner"s heli? Something with a little more power and agility — something that"s a little more…fun? Then the Proto MAX is your heli! It"s small enough to fly indoors, so you fly rain or shine. And it not only delivers the kind of flying you crave, it makes learning new skills easier! Here"s how: It"s totally assembled and completely equipped! — it"s simple math: With zero to build or buy, there"s nada between you and your first flight! Includes a heading-hold gyro — makes the MAX way easier to handle. Way! High-capacity LiPo battery — little tiny pack, great big flight time. Recharges right on the transmitter for MAX convenience. 2.4GHz transmitter with LCD, charger and dual rates — Very cutting edge and dual rates make it very flier-friendly. (More on this elsewhere.) Four "AA" radio batteries — use "em or lose "em. Your choice. Screwdriver — for easy blade changes (or fixing your glasses.) SPECIFICATIONS Stock Numbers: RMXE6091 Main Rotor Diameter: 7.5 in (190 mm) Overall Length: 8.25 in (210 mm) Weight: 1 oz (28 g)