SENNHEISER ELECTRONIC GMBH & CO. KG
-BV-KP -KP-NP-CP-V-KP-V-CP-V-RP-B-CP-BV-CP-B-K-BV-K -V-KX
-B = battery powered and/or -P = panel powered,
with battery compartment at the housing´s rear side
-B-KP
panel powered only,
without battery compartment
at the housing´s rear side
-P / -X = panel powered,
without battery compartment
at the housing´s rear side