Features:Quad-bearing design.Improved quad-bearing design of the Radio sticks makes the control silky and smoothly.Adopted core technology of DEVO 12，versatile function ，high cost performance .2 Model Type: Helicopter and Airplane. Improved programming with more mixes and better interface Program MIX ��?MIX to Throttle.7-point throttle curve makes the control exquisitely.Fifteen-model memory.Online update funcation:Enjoying update the latest program and copy model data freely and easily.Specification:Encoder: ARM micro computer systemFrequency: 2.4Ghz�ꡧDSSS��?Output power: -5dBm~20dBmBattery: 1.2VX8 NiCard or1.5VX8 AA dry batteries(Not included)Current Drain: ?��170mAPackage size: 28 * 24 * 11cm / 11 * 9.4 * 4.3inPackage weight��o1032g / 2.3lb(w/o TX battery)Package list:1 * Walkera DEVO 7 Transmitter Model 2�ꡧNot include Receiver��?1 * cable1 * CD