• GPS Receiver. • VHF Beacon. • Basic 3-axis Activity sensor. • Mortality Sensor (5-minute activity sensor). • Temperature sensor. • Stainless steel label plate. • 2D Battery Packs - user replaceable battery packs for multiple deployments. • Electronics to withstand temperatures ranging from -40 degrees C to +70 degrees C. • Iridium Satellite Network Communication. • Iridium Satellite Communication modem. • Ability to make remote changes including GPS schedules, Iridium schedules, VHF schedules, Mortality schedules, Skip counts, UTC. • VHF beacon frequencies can be changed remotely. • 3 Kbyte data plan (150 fixes/month). • Transmission of a minimum of 8 GPS positions per day. • The collar manufacturer shall provide data viewing and management of software and also provide a data viewing app for remote viewing in the field. • Allow users to use mobile phones and tap read the collar housing to receive collar information without removing the magnet. • Provide 5-minute activity bins stored on-board. • Activity data to be sampled over a 5-minute period and stored 24 hours a day. • Collar sizes to fit 25 female mule deer (≥ 1.5 years of age) and 25 female pronghorn (≥ 1.5 years of age). • User has the ability to remote drop collars. • Replaceable mechanical drop-offs shall be built into the battery packs with the ability to be reprogrammed by the user without having to return collars to the manufacturer. • Collars shall not have foam inserts (EVA or high-density foam). • 2-year warranty on collar electronics. • Collars shall not need to be returned from the field to claim warranty.