AD-24SH 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 N type connector. Impedance 50 ohms Gain 4 dB.
Dimensions are:8.5" X 1.0".
VRX-24
RMX-2500
MX-4000
MX-3000
LX-3000/1