DESC: Escort radar detector is optimized to provide the long-range protection on X, K, Ka, POP, and now Ku-band radar for European travel. Bothersome false alerts can be eliminated because Escort 9500i will intelligently learn and remember areas with false alerts and permanently lock them out using its new TrueLock feature with GPS. The Escort Passport 9500i varies its sensitivity based on your vehicle speed. At interstate speeds, all radar bands operate at full sensitivity; at slower speeds, X and K-band sensitivity is minimized. Alert volume automatically adjusts to your radio and other vehicle sounds to make sure it's audible.