Whistler XTR-440 Laser/Radar Detector Battery Operated with Built in Battery Charger with Blue Text Display Battery-powered radar/laser detector provides up to 15 hours operation on a single charge (power cord and rechargeable batteries provided) Provides 360-degree alerts for selectable radar and laser signals, POP mode alerts, and Safety Warning System alerts Blue backlit text display provides distinct visual confirmation of signals detected, signal strength, and indicates engaged modes of operation VG-2 cloaking technology makes you invisible to radar detector detectors; 3 City Modes and Highway Mode for reducing false alerts; dim/dark mode One-year warranty