... -lot charge, freeway ETC, safety-inspection from port or custom.2 Personnel management: quick attendance administration, conference signature system, student safety ... , railway management, and container transfer control tracking management.TypeMR3002A Frequency2.4GHz-2.5GHz ISM mircowaveCommunication modedynamically encrypt modeAsynchronism communication speed9600Bps-115200BpsSignal modulation ...