DESC: The Whistler XTR-500 radar detector is a full featured radar detector at a value price. The XTR-500 detects POP mode radar, provides Real Voice™ alerts, and offers a red alpha-numeric text display. The XTR-500 also features Whistler's attention grabbing feature, the dual LED alert periscope. Two blue LED's sit atop the XTR-500 and flash when you receive an alert, helping to grab your attention. The Whistler XTR-500 also features 3 city modes, which allows you to adjust your tolerance false alerts. An Alert Priority feature makes sure the most important alert is displayed if multiple alerts are detected. Other features include a battery saver, and 3 adjustable levels of brightness.