Audio-Technica ATW-CHG3AAD Two-Bay Charging Station with AC Adapter (3000 Series)The ATW CHG3AAD bundles the ATW CHG3A two bay charging station with the AD SA1230XA AC adapter. The charging station works with 3000 Series transmitters, 3000 Series IEM receiver, and System 20 PRO transmitters, charging NiMH batteries (not included) while they are housed within the transmitters. The station will automatically shut off if alkaline or damaged batteries are detected. Once fully charged, a maintenance charging function ensures that