The input section of the Lectrosonics SMQV features the unique servo bias input circuitry with a standard TA5M type jack for use with electret lavaliere mics, dynamic mics, or line level signals. A DSP-controlled analog audio limiter is employed before the A-D converter. The limiter has a range of more than 30 dB for excellent overload protection and a dual release envelope that makes the limiter acoustically transparent while maintaining low distortion. The limiter recovers quickly from brief transients, with no audible side effects, and also recovers slowly from sustained high levels to keep audio distortion low while preserving short term dynamics.To meet the demand for both extended operating range and extended battery life, the "V" series SM transmitters offer selectable output power of 100 or 250 mW. A third selection at 50 mW is provided for some theatrical applications where the system design specifies lower transmitter power.Lectrosonics SMQV FeaturesDigital Hybrid Wireless TechnologyVariable, selectable power output:SMQV: 50mW, 100mW, 250mWMembrane switch control panel with LCD display256 synthesized UHF frequenciesWide input dynamic rangeDSP based pilot-tone signalCirculator/Isolator output stageSplash-proof, machined aluminum housingNon-corrosive, superhard finishThis is a like new Lectrosonics SMQV Block 25 unit. Included:Lectrosonics SMQV Block 25Original BoxAntennaPouch2 AA batteries.