Shure Professional UHF Wireless Vocal Microphone The Beta 58A dynamic vocal microphone is precision-engineered for live performance and project studio recording. A tailored frequency response accentuates vocals, and the supercardioid pattern isolates from other sound sourcesIt combines simple setup and an intuitive interface for performance you can trust. The Analogue Wireless Receiver BLX4 provides improved linearity and frequency response for up to 12 compatible channels per group with group and channel scan for easy set-up. The BETA58A with BLX2 handheld transmitter is The dynamic vocal microphone precision-engineered for professional sound reinforcement. You will get up to 14 hours of continuous use using 2 x AA batteries (included) and an operating range of 100m.