|Megatech’s Hopper-Fly is by far the most stable, 100% assembled indoor/outdoor ready-to-fly helicopter ever offered—period! The precision synchronization of its CBR-Drive™ (Contra Balanced Rotational Drive), keeps the twin rotors rotating in exact harmony. Accordingly, the Hopper-Fly performs rock-steady hovering right out of the box. Also adding to the Hopper-Fly fantastic easy-going flying characteristics is centrifugal stabilization offered by the weight fly-bar; a feature normally found on much more expensive model helicopters. Fly day and night with operating navigational lights. The Hopper-Fly features variable speed controls on the transmitter and when you alternate the hover and turbo buttons you can make the Hopper-Fly perform steady veering maneuvers.