UNMATCHED RANGE & SENSITIVITY - Industry Leading Performance with Advanced False Alert Filtering is THE choice for drivers who demand the highest level of protection against speeding tickets. | GPS TECHNOLOGY w/ AUTO MUTE MEMORY - The R4 can remember and automatically mute false alerts (such as retail store doors) along your routes so you never have to listen to the same false alert twice. | RED LIGHT AND SPEED CAMERA ALERTS - Preloaded Red Light and Speed Camera locations with Free Database and Firmware updates ensures your detector will never be out of date. | MULTI-COLOR OLED DISPLAY - is easy-to-Read and allows for more useful information to be displayed at once. This improves your overall situational awareness. | VOICE ALERTS - Voice alerts allow for hands-free operation and provide clear communication. Voice Alerts are programable to fit your style so you can keep your eyes on the road with no distractions. | ADVANCED FALSE ALERT FILTERING - the R4 has the Best K/KA Band filtering with the Least Amount of False Alerts from blind spot monitoring & Collison avoidance systems in other vehicles. | It is important to note: Radar Detectors are not designed to detect police officers or police vehicles. Instead, they are designed to detect radar & laser signals. Therefore, if a police vehicle does not have its radar or laser turned on, a radar detector will not alert you.