Walkera 7CH 2.4G DEVO 7E DSSS Radio Control Transmitter Model 2 for Helicopter Airplane USB online update makes you always enojoy the lastest programme.up to 30-model data can be saved.. Adjustability of hi-frequency output power enjoys more personality and friendly environment. DEVO-7E adjusting the gyro sensitivity makes hovering flight and fancy flight in an easy way. Wireless data transfer and trainer function between two transmitters. Improved design of the Radiosticks make the control silky and smoothly 4 different kinds of stick mode. suitable for helicopter and airplane.