Analog wireless receiver provides improved linearity and frequency response with group and channel scan for easy set-up. Features include microprocessor internal antenna diversity, frequency QuickScan and two-color audio status indicator LED. The durable BLX4 features simple setup, intuitive controls and microprocessor-controlled internal antenna diversity. One-touch QuickScan frequency selection quickly locates the best open frequency in case of interference. For use with BLX® Wireless Systems.