Product details:
For Sound Devices MixPre-3 and -6 Mixers, Allows Use of Sony L-Series Type Battery, Single MDV Fitting Plate. The SD-2 Sound Devices MDV Battery Adapter from Hawk-Woods is designed for the Sound Devices MixPre-3 and MixPre-6 mixers. The adapter allows you to use an MDV Sony L-series battery. It slots onto the rear of the battery compartment of the Sound Devices mixer and clicks into place to ensure a secure connection.
