The Shure Dual Channel Lavalier Wireless System BLX188E/CVL includes two reliable portable SM31FH Cardiod condenser headset mi... The Shure Dual Channel Lavalier Wireless System BLX188E/CVL includes two reliable portable SM31FH Cardiod condenser headset microphones, a Dual Channel Receiver (BLX88) with microprocessor- controlled internal antenna diversity and two BLX1 Bodypack Transmitter. Overall is that system the ideal entry into the Shure Wireless technology. SM31FH Headset Microphone Features: Wireframe headset fits securely and comfortably for fitness and aerobics instructors Moisture-repellent hydrophobic fabric protects the microphone cartridge from harmful corrosion that occurs in humid environments Flexible gooseneck provides discrete adjustment capabilities to optimize placement for greatest isolation Lightweight and low-profile design won't fatigue instructors during high-impact use TA4F (TQG) connector is compatible with any Shure wireless bodypack Included windscreen tames plosive, breath, and wind noise for clean and intelligible sound Tailored frequency response ideal for crisp, clear vocal reproduction Legendary Shure precision engineering for durability and performance BLX1 Bodypack Transmitter Features: Battery Life: Up to 14 hours Typical Operating Distance: 300 ft (100 m) transmission radius 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 BLX88 Dual Wireless Receiver Features: XLR and ¼" output connectors Microprocessor-controlled internal antenna diversity Two-color audio status indicator LED Green: Normal audio levels Red: Excessive audio levels (overload / clipping) !!! 3 Years Warranty!!! !!! 30 Days Money Back Guarantee!!!