Whistler XTR-538 Laser Radar Detector High Performance 360 Degree Max Coverage with Real Voice Alerts and Total Band Protection Total Band Protection - Provides Complete Band Coverage of all Laser, Radar (X, K, and Ka bands), VG-2, and Safety Radar bands. 360 Degree Protection - Units with 360 protection detect signals from all radar, laser, VG-2 and safety radar systems wherever they come from; front, rear or from the side. VG-2 Detection -The VG-2, also known as a "radar detector - detector," is a special receiver used by police to detect signals radiated by a radar detector. Thanks to Whistler's patented VG-2 cloaking technology, your detector will remain invisible to 3 City Modes/Highway Mode- Highway mode provides full audio and visual warning of laser/radar systems while maintaining full sensitivity, and is the default setting of Whistler laser/radar detectors. City mode helps reduce the annoyance of automatic Extra Feature includes: Red OLED Text Display, REAL VOICE ALERTS, Quiet/Auto Quiet Modes, Battery Operated, Alert Priority, Selectable Bands & Alerts, and Periscopes