AD-24SHS antenna is highly recommended for Police robots transmitters. It is omni directional and works for any transmitter or receiver in 2.4 GHz band. The antenna is using an SMA type connector. Impedance 50 ohms Gain 6.5 dB.
Dimensions are:35cm X 2.54cm.
VRX-24
RMX-2500
MX-4000
MX-3000
LX-3000/1