The AKG CU400 is a high-performance drop-in-style battery charger for WMS420, WMS450 and WMS470 series wireless handheld and body-pack transmitters. The charger's design and the integrated charging contacts of the transmitter conveniently eliminate the need to remove the battery before charging; simply drop the entire transmitter into the slot. The charger monitors battery voltages and temperatures during charging and automatically ends the cycle when the batteries are fully charged. The CU400 provides a status display LED for full control of the charging status.