The Bad Elf GPS Pro shares location information with up to five iOS devices simultaneously using Bluetooth technology. Large LCD display shows critical status information about location, power, Bluetooth connectivity, and trip data storage. Record up to 100 hours of trip data for sharing and storing. Extra long battery life of up to 16 hours using Bluetooth or up to 35 hours just data logging. The rugged and splash proof enclosure stands up to outdoor use. Works with all location based apps.