A radio receiver 516 for receiving travel information, such as traffic events or the like, and optionally parts 520, 522 of an antenna therefor, are located within a housing 512 of a portable device having location determining capability, such as a PND 510. A common port 514 is used for connection both to data and power, for example in a home environment, and also to receive signals from the antenna, for example in a vehicle environment, with a switch 518 being provided within the device for switching between the two.