The RTR 500 GSM mobile base station from T&D is capable of providing operators with wireless communications with the functionality of GSM networks. This may be utilized as a base unit for the latest RTR 500 wireless data logger units. This product may also be used to send communication signals, data, and warnings from any remote area or in places that are out of the way through its GSM cellular network capabilities. It is also fitted with a warning system that notifies the operator through e-mail or SMS when the measurement value goes beyond the upper or lower bound that has been set. Moreover, these may be used in applications that are concerned with monitoring temperature and humidity in transporting services.