... .5 for Y3 3-axis 4-axis Y6 6-axis single-axis KK Multicopter Controller Board V5.5 for Y3 3 ... -axis 4-axis Y6 6-axis single-axis 100% Brand New! The newset QuadCopter V2.3 ProgramLatest ... servo signal output, support normal ESC / analog servo4. Support for single-axis / UFO, Y3 3-axis, Y4-type 3-axis, 4 ...