You are looking at the world first mini chopper packed with twin rotor design, the Tandem-Z. 3 Channel helicopter (only 25 grams !!!). It is made from unique materials to withstand crashes. This mini helicopter is packed with break through technology ! It has twins rotor blade located at the front & Rear end, when the two blades start to spin, it creates a sophisticated gyroscopic effect that makes the helicopter hover stably or to move in forward, backward, left and right direction. You must read the instruction very carefully to fully understand the myth of controlling this helicopter.How does it go forward & Backward ?The front rotor blade is built at an angle about 15 degree counter-clockwise and the Rear rotor blade is built at an angle about 15 degree clockwise. When the rear rotor spin faster than the front one, it will drive the helicopter forward and vice versa. But at this point, we still haven"t figure out what"s exactly is the mechanism behind the design, but all we know is that the front blade is adjustable and this helicopter is likely to become the best selling one in 2008. Although the Tandem is too titchy to carry troops or heavy artillery, it"s more than capable of lifting your spirits (groan!) as it aka-aka-aka"s around the room. And that"s no surprise because this is the world"s first twin-rotor micro chopper. It"s more fun than a Sea Knight load of fun things from Funville.