Whistler PRO-3600 High Performance Laser Radar Detector: 360 Degree Protection and Voice Alerts Versatile installation with discreet console; compact to provide many mounting choices. Modular Design with three aux ports allows customizable enhanced functionality, with optional additions such as GPS, Rear Laser-Radar Antenna, Laser modules, etc. Exclusive Twin Alert Periscope provides an added attention-getting visual alert; High-gain optical lens for increased laser sensitivity; TOTAL BAND PROTECTION with 360 MAXX COVERAGE - detects from front, sides, and rear. Three City modes reduce the annoyance of false alerts from outside sources; selectable bands allow specific bands to be turned on or off. Four filter modes reduce false alerts from other radar detectors. Provides Real Voice alerts, allowing you to keep your eyes on the road while staying informed. When 'Mute' or 'Auto Quiet' modes are engaged, the audio will be cancelled to the voice port. Provides Real Voice alerts, allowing you to keep your eyes on the road while staying informed. When 'Mute' or 'Auto Quiet' modes are engaged, the audio will be cancelled to the voice port. Exclusive high-performance antenna with integrated laser detection Red tri-directional text display shows alerts received, digital signal strength & engaged modes in text format Display can be mounted horizontally, upside down or vertically Laser Atlanta Stealth mode technology Discreet tri-colored LED & security alert mode provides user selectable choice of color when alerting & a blinking red theft deterrent when the unit is off