The BLX288/SM58 Wireless Dual Vocal System with two SM58s, an industry standard, highly versatile cardioid dynamic vocal microphone, tailored to deliver warm and clear vocal reproduction combines simple setup and an intuitive interface for performance you can trust. The dual-channel BLX288 receiver is a tabletop design with XLR and 1/4" outputs, and features one-touch QuickScan technology, which examines the room and the available frequencies, and selects the best one.