World's First Palm Size Professional Scale Helicopter First, I need to explain about the long product name. Factory tends to assume players knew all their product history..... for V120DQ02, "V120" means Flybarless helicopter in 120 size, "DQ" means it's a Scale Fuselage model and "02" means it's a rudder servo controlled tail pitch model. This V120DQ02 is a unique and one of a kind on the market, but you may say there are a lot of palm size helicopter with scale body, why this one is special? I would say because of the advanced electronics, V120DQ02 has a Flybarless Rotor Head to keep the best of a Scale Helicopter should have, and thanks for the Walkera 3-Axis Gyro, the helicopter flies perfectly stable, yet keeping the most realistic appearance. Mass producing a detailed Scale Fuselage and a 3-Axis Gyro involves very difficult technology and production skills, only Walkera has this ability to do it at the moment, so in another word you're buying the most advanced palm size helicopter in the world.