Wireless UHF System: Up to 165 feet wireless range with UHF band transmitter for clear audio transmission. Complete Set: Includes (4) wireless beltpack transmitters and (4) headset microphones, perfect for multiple users. Bluetooth Streaming: Instantly stream audio from Bluetooth-enabled devices (smartphones, tablets, laptops). Versatile Audio Inputs: RCA-to-Aux (3.5mm) cable and 1/4' audio cable for connecting external devices. Noise-Eliminating Technology: Equipped with SMT technology and low noise circuitry for crisp, clear vocals. Ideal for Various Settings: Great for public address, classrooms, karaoke, and professional audio stage performances. Adjustable Mic Volume: Independent channel volume controls for easy sound management.