The term dual-frequency receiver is very common in cell phones that have been using it for a while now. As the name suggests, this receiver is capable of receiving more than one frequency at a given time. Countries like Russia have GLONASS while China uses BeiDou, both of which are dual receivers. The frequency bands in these range from 1,176MHz to 1,610MHz. The multiple bands are known to increase the accuracy of tracking and are useful in various scenarios, including global tracking and marine operations.