Lectrosonics HM Digital Hybrid UHF plug-on transmitter features a DSP-based design that allows the transmitter to operate in its native Digital Hybrid Wireless mode, Lectrosonics 200 Series, 100 Series, IFB product groups, plus two modes for compatibility with analog receivers from other manufacturers. A unique multi-voltage phantom power feature allows the transmitter to be used with virtually any microphone, including high-current condenser types, expanding its usefulness in high-end applications such as motion picture production.Lectrosonics HM FeaturesDigital Hybrid Wireless TechnologyMembrane switch control panel with LCD displayConverts microphones with XLR jacks to wireless operationSelectable 5, 18 and 48 volt phantom power plus off position for dynamic microphonesAdjustable low frequency roll-offPowered by two AA batteries256 synthesized UHF frequencies100 mW output powerRugged machined aluminum housing This is a never used Lectrosonics HM. However, it is the older version. It DOES NOT have backlight.