 Duty Cycle Scheduling - GPS devices typically record data about the animal's exact location and store readings at pre-set intervals known as duty-cycles.By setting the interval between readings, the researcher is able to determine the lifespan of the device - very frequent readings drain battery power more rapidly, whereas longer intervals between readings might provide lower resolution but over a longer deployment.Release Timers - Some devices can be programmed to drop off at a set time/date rather than requiring recapture and manually retrieval.