This is a terriffic antenna for ELRS modules like the ES24TX. Tuned for 2.4GHz ELRS this antenna uses an SMA connector for standard installation.

Frequency  (MHz):     2400.0
Efficiency (dBi):   -2.94
Gain (dBi):    4.18
Efficiency (%):      50.77
Directivity (dB):    7.12
Peak Gain Position (Theta):  0.00
Peak Gain Position (Phi):     270.00
Weight(gram):      5.83
Length(mm)*width(mm):     69*45
Plug type:     SMA
Package include: Happymodel 2.4GHz Moxon antenna x1pcs