Feed hub gives hunters peace of mind: know your feeder is operating as expected and receive alerts when it's time to plan a trip to refill.Feed hub enables hunters to remotely set and adjust feed times, days and feed cycles, and dispense feed on demand all through the convenience of the moultrie mobile app.It is compatible with all major spin cast feeders and requires moultrie mobile app subscription ($6.99 monthly or $49.99 annual plan)Digital: YesHousing Material: Plastic