The Uniden R4 is considered one of the longest-range non-arrow radar detectors available in the market. This radar detector is equipped with advanced technologies that allow it to detect radar signals from a distance, providing drivers with ample warning time to adjust their speed. The Uniden R4 uses a dual antenna design that provides 360-degree protection and allows it to detect signals from all directions. In addition, its dual-antenna design also allows for directional arrows, so drivers can determine the location of the radar signal and adjust their speed accordingly. The Uniden R4 also boasts advanced filtering technology that helps reduce false alarms, making it a reliable choice for drivers who want a radar detector with long-range capabilities and accurate alerts.