The Whistler CR series laser radar detectors are a high performance, professional grade dash models which detect all new lasers used in North America. Each CR series model detects X band, K band, Super Wideband Ka, and laser protection - the only 4 bands used for speed measurement. They also feature POP Mode detection, an advanced speed detection capability that responds to brief bursts of radar. Equipped with 360° Maxx Coverage which provides complete perimeter protection, detecting signals from the front, sides, and rear. Traffic Flow Signal Rejection (TFSR) helps eliminate alerts from radar based traffic flow sensors. It features 3 city modes/highway modes (City, City 1, and City 2) to reduce the annoyance of false alerts.