Audio-Technica ESW-CHG4AD ESW 2-Bay Charging Station BundleMake sure your ESW body pack and handheld transmitters (sold separately) are ready when you are with the ESW CHG4 two bay charging station. A rapid recharge feature supplies a full charge to two transmitters in approximately three hours. Up to four charging stations (sold separately) can be linked with the included AC adapter and a Cat5 cabling (sold separately). Conveniently update firmware on all docked transmitters remotely and monitor charging