cofdm modulation; H.264 video compression; narrow-band fro long range; frequency customized; duplex audio and GPS function FeaturesDuplex audio and GPS location functionsStable transmission with Omni-directional antennaGreat security by encryption of AES 128 bit/ ALLTECH Basic ScramblinAluminum casing with built-in cooling plates, waterproof and shockproofCOFDM modulation, Stable transmission,H. ...