When there is a threat, you can choose to be alerted by the real voice alert, or by the low profile periscopes; these LED lights can be programmed to flash when there is a threat, stay solidly on, or be turned off completely. All three models in the XTR-600 series have radar signature ID and laser signature ID. This basically means that when it has received an alert, the display will give you detailed information about the radar or laser it has detected. All three models in this series are also Intellicord ready, which means that you can program settings on them using a remote control. The Intellicord system is an add-on with a $27.95 MSRP. The XTR-690 SE has most of the same specs as the higher end XTR-695, but with a plain red display instead of the 7 color backlit LCD text display, and no 2.5mm external audio jack. The XTR-690 SE is also slightly bigger than the XTR-695. The Whistler XTR-690 SE radar and laser detector comes with a three year warranty.