Most but not all of our GPS products are shipped with a VHF transmitters.  However, these may or may not be included in the GPS device cost. VHF transmitters are made on a custom basis just as the GPS devices are.  In this way we configure the device most appropriate for your work.  Telemetry Solutions’ VHF transmitters include a mortality signal with a user specified mortality delay time. For VHF transmitters weighing from 1 -3 grams we purchase our transmitters from another telemetry company.