Meet the Proto X from Estes, the brand you know and trust. Not only is the Proto X the world's smallest quadcopter, it's also one of the world's lightest! The 1.8" x 1.8" Proto X is tiny, ideal for indoor flying – and it weighs only four-tenths of an ounce. Bright, built-in LEDs make it easy to see the Proto X in low-light conditions. A 2.4GHz radio not only allows for interference-free flight – it makes it easy for multiple Proto X helis to fly at once. A 3.7V 100mAh LiPo battery, USB charge cord and spare rotor blades are also included in the ready-to-fly package. All you need to add are two "AAA" batteries!