North Star’s Bird Borne PTTs offer long operational life, high location accuracy, programmable duty cycles with multiple seasons, integrated sensors, and package sizes ranging from 9.5-80 grams. Conventional VHF transmitters can be incorporated into the package, if desired.

Sensors included in all North Star PTTs include temperature, activity, battery voltage, duty cycle season, and transmission counter. North Star can deliver the PTTs as backpacks (typical configuration). Custom attachment designs are also possible, such as leg mounts (for species such as cranes), neck mounts (for species such as swans), or patagial mounts.

Solar PTTs are also available in a variety of sizes, with operational lives measured in years.