Hopper-Fly is by far the most stable, 100% assembled indoor/outdoor ready-to-fly helicopter ever offered! 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 Hopper-Fly fantastically easy-going flying characteristics is centrifugal stabilization offered by the weight fly-bar; a feature normally found on expensive model helicopters. Fly day and night with operating navigational lights. 100% built & ready-to-hover out of the box Extremely easy to fly—perfect for the first-time pilot Operating Navigational Lights Precision synchronized CBR-Drive™ for rock-solid hover control Ultimate stability with weighted fly-bar Hovers up to 100-feet high Dual function total command transmitter provides turbo and hover control functions Up to 4-minute flight duration Rechargeable Extended Runtime Battery Charging Station for Quick Recharges Anytime – Anywhere (no AC or DC hook-up required)! Available on different frequencies for flying together no-251Regular price: $175.00Sale price: $69.95