Combining professional sound quality with streamlined setup and an intuitive interface for outstanding audio performance straight-out-of-the-box, the Shure BLX Wireless Systems are precision built and available in a range of configurations - the most accessible way to command the stage. The PGA31 cardioid condenser microphone boasts Shure quality and an updated design for long-wearing comfort at an affordable price point. With a robust metal construction, the BLX4R rack-mountable receiver is simple to setup and features intuitive controls, such as One-Touch Quick Scan frequency selection - rapidly locating the best open frequency in case of interference - and the detachable antennas enable fast antenna distribution. Includes rack mount kit. Features Frequency Range: 662MHz-686MHz Quick and easy receiver frequency matching TQG connection for use with Shure lavalier, headset, earset and instrument microphones and guitar cables Easily accessible On / Off switch XLR and ¼ inch output connectors Microprocessor-controlled internal antenna diversity Two-color audio status indicator LED - Green: Normal audio levels, Red: Excessive audio levels (overload / clipping) Adjustable output level LCD display with detailed RF and audio metering Wearable wireframe headset fits securely for multi-instrumentalists and active performers Permanently-charged electret condenser element for detailed, crisp vocals Unidirectional (cardioid) polar pattern rejects unwanted noise for improved sound quality and higher gain-before-feedback Flexible gooseneck design and discrete adjustment options optimize microphone positioning for further source isolation Included windscreen tames plosives for clean and intelligible sound reproduction TA4F (TQG) connector seamlessly integrates with existing Shure bodypack systems Included windscreen tames plosive, breath and wind noise for clean and intelligible sound Tailored frequency response primed for great sound on vocals Specifications Frequency Range: M17 - 662MHz - 686MHz Transducer Principal: Condenser Polar Pattern: Cardioid What's in the Box? BLX1 Transmitter with up to 14 hours of continuous use with 2 AA batteries. 300 ft (100 m) transmission radius. BLX4R Rack-mountable receiver with removable antennas for quick distribution. PGA31 Headset Condenser Microphone for use with Shure Bodypack Wireless Systems. 1 PS24 Power Supply 1 windscreen 1 clothing clip