The RMR-D240 is a completely integrated radar/laser detector which responds not only to all the radar guns in use today, including Stalker, but also to the other latest development in speed monitoring devices- the laser gun.This model provides distinct visual and audible alerts to warn you of the presence of X, K, and all kinds of Ka Band radar guns in the front andrear of you. This model also provides the benefit of undetectability by alerting you to the presence of VG-2