The Sennheiser LM 6070 (article 509457) is a charging module that installs in Sennheiser's L 6000 rack-mount network charger. It charges the BA 70 lithium-ion battery pack used across Sennheiser's Evolution Wireless Digital family, including EW-D, the portable EW-DP and the multi-channel EW-DX transmitters, and each module takes two BA 70 packs. It is aimed at theatres, broadcasters, rental houses and larger venues that already use the L 6000 for other Sennheiser batteries (such as the BA 60/61/62 modules of the Digital 6000 range) and want to charge their EW-D batteries in the same rack unit rather than on separate desktop chargers. The L 6000 charger itself and the BA 70 batteries are sold separately. The module weighs about 190 g and measures roughly 200 x 100 x 60 mm. Sennheiser gives a two-year warranty. Check that your L 6000 has a free module bay before ordering.