Hunter A2CWIFI Internal Wi-Fi Expansion Module for ACC2 Decoder The ACC2 Decoder controller is specifically designed to manage Hunter ICD decoders on large projects, and is expandable to 225 stations. The controller offers extreme flexibility, with 32 independent programs, 10 start times, and a variety of overlapping, stacking, and management configurations. The powerful Flow Manager takes full advantage of sophisticated irrigation designs, watering as much as possible in the shortest possible amount of time —up to 30 simultaneous solenoid (maximum 20 per output module) at user-specified flow rates.