New Olympus D-7AC Power Supply.

The D-7AC (200850) can be used with the Digital Voice recorder DS-4000 and DS-3300 as well as the CR3 Docking Station.
 

This 4.8V high power AC Adapter is needed to recharge the Ni-MH battery pack (BR402).
Just set the Digital Recorder with its inserted battery pack into the docking station (CR3) and connect the AC adapter.