The Shark Cordless Detect Pro features 4 detect technologies that detect & react to to dirt to boost power and increase cleaning up to 50%* when carpet and dirt is detected (*Eco vs. Detect Boost (with both Carpet and Dirt), based on ASTM F608). DirtDetect senses hidden dirt & automatically boosts power, EdgeDetect senses edges & corners and doubles suction**, Floor Detect detects floor types & adjusts performance, and LightDetect illuminates dark areas to spot hidden debris. | Shark | | Refurbished Excellent | Detect Pro Cordless Stick Vacuum, QuadClean Multi-Surface Brushroll, HEPA Filter, Detect Technology | White/Beats Brass | Best Buy