FrSky Spare Antenna:
- 10cm Set for XM, XM+, and others
- 15cm Set for R-XSR, XM+, X4RSB, S6R, and others
The 1/4 wavelength of 2.4GHz is ~31.23mm (R-XSR ~23.5mm, XM+ ~23mm, X4R-SB ~33.25mm)
FrSky Spare Antenna:
The 1/4 wavelength of 2.4GHz is ~31.23mm (R-XSR ~23.5mm, XM+ ~23mm, X4R-SB ~33.25mm)