In some examples, a device receives a dynamically selectable threshold, and responsive to the threshold being set to a first threshold value, causes transmission, to a computer over a communication interface, location data relating to a geographic location of the device at a first frequency of transmission, regardless of whether the device is stationary or in motion. Responsive to the threshold being set to a second threshold value different from the first threshold value, the device causes transmission, to the computer over the communication interface, the location data relating to the geographic location of the device in response to determining that the device has moved by a distance that exceeds the second threshold value.