The WHISTLER XTR-185 Solar-Enhanced, Battery-Operated Radar/Laser Detector is battery operated with a build-in battery charger. Whistler XTR-185 uses patented VG-2 Cloaking Technology to keep you safe on the road. It has total band protection with a 360 degree total perimeter protection. Includes 3 city modes/highway mode, high gain lens and tone alerts.