The Shure PGX Series wireless microphone systems combine the convenience of single touch remote channel setup with the reliability of diversity UHF operation. Channel and frequency settings are remotely synchronized from the transmitter to the receiver via infrared. The result allows for fast set up time and enhanced user control. The user friendly yet rugged design of the Shure PGX systems measure up to provide years of reliable use in halls, houses-of-worship, clubs, theaters, restaurants, bars, etc. This system includes the PGX4 receiver, PGX1 bodypack transmitter and WL185 lavalier microphone.The PGX4 Receiver operates over an 18MHz UHF bandwidth with the flexibility of selecting up to 90 UHF frequencies. The diversity design enables dual internal receiver circuits to compete for the strongest possible reception. The result minimizes noise and RF interference. The rear panel features XLR and 1/4″ phone outputs. An infrared port enables frequency information to sync with the transmitter remotely.The PGX1 Bodypack Transmitter is lightweight and durable, featuring a 4-pin mini microphone input. The microphone input is compatible with Shure’s WL series lavaliers, headsets and instrument cables. A 3-position input level switch enables the microphone input to accommodate microphone level and line level signal, as well as provide added headroom for distorted audio signals. The transmitter operates up to 8 hours on 2 AA alkaline batteries.Specifications:SystemType of System: Rack/Table Top Mountable UHF Diversity Wireless Lavalier SystemRF Carrier Frequency Range: L5/644 – 662MHzApprox. Working Range: 300′ (100 m)Overall Frequency Response: 45Hz – 15kHz, +/-2dBSignal-to-Noise Ratio: > 100dB A-weighted# Of Channels: 90 Selectable Frequencies# Of Simultaneous Systems: 12ReceiverType of Receiver: PGX4 Rack/Table Top Mountable UHF Diversity ReceiverType of Outputs: XLR 3-pin male – 200 Ω, 1/4″ Phone – 1 kΩHeadphone Monitoring: NoPower Requirements: 12 – 18VDC @ 150mA, supplied by external power supplyBattery Type/Approx. Life: Not Applicable, Unit Does Not Operate on BatteriesDisplay LCD Display: Frequency & Group StatusMounting Options: Rack mountable with optional URT rack-mount trayAntenna Type: Dual 1/4 wave antennasDimensions (HxWxD): 1.6 x 7.125 x 4.1″ (40 x 181 x 104mm)TransmitterType of Transmitter: PGX1 UHF BodypackType of Input Connector: TA4 InputType of Microphone: WL185 Lavalier Included with this SetPolar Pattern: CardioidInterchangeable Mic Heads: Yes, Any of the Shure ‘WL’ Lavaliers, Headsets, or Instrument Cables (Optional) Can Be Used with this TransmitterBattery Type/Approx. Life: 2 AA size alkaline or rechargeable – approx 8 hours alkalineMute Switch: Integrated On-Off / Mute SwitchLevel Control: 3-position gain adjust (mic, 0dB, -10dB)-10 dBV maximum at “mic” gain position+10 dBV maximum at 0dB gain position+20 dBV maximum at -10dB gain positionAntenna Type: Flexible 1/4 Wave Whip AntennaDisplay: Power / Infrared / Mute indicator LEDDimensions (HxWxD): 4.25 x 2.50 x 0.75″ (108 x 64 x 19mm)