... 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 ... analog servo4. Support for single-axis / UFO, Y3 3-axis, Y4-type 3-axis, 4 axis, 6 axis, V22 flight mode5. Supports 4-axis "+" and "X" flight ... mode, support for six-axis "HEXA6 ...