Attachments Compatible Only to M528, M508 Fuel Monitoring System Has to be customized as per Tank Dimensions like Size, Shape, Capacity. Rfid Card Reader Supports card, AM modulation EM ID card or 4100 compatible RFID card or keychain. Two Way Communicator Two-way communication is useful to interact with driver of the vehicle and owner to help. Temperature Sensor Useful for Cold Storage Vehicles and Vehicles which are used for transportation of Goods that need to be transported. Camera For GPS Tracker Camera can also be set for automatic clicking when the ignition is ON or in case of other events.