The Shark PowerDetect Clean & Empty (IP3251) system is the ultimate cordless solution for powerful, intelligent, whole-home deep cleaning. It features an Auto-Empty system that charges & empties your vacuum after every clean, reducing dust exposure by 1000x* vs. traditional emptying. PowerDetect is powered by Sharks most powerful cordless suction** PLUS a redesigned DuoClean Detect nozzle with dirt-detecting intelligence and multi-directional cleaning, making it THE BEST debris cleaning*** of ANY cordless vacuum. While most vacuums push around debris in the back-stroke, the redesigned DuoClean Detect nozzle eliminates this problem by capturing more**** dirt, dust, and debris in forward AND reverse for faster cleaning*****. PowerDetect has an impressive 70min of runtime and a MultiFlex wand for effortless under-furniture reach and flex storage. (*Based on third party-plume testing while emptying vs. Shark Navigator upright manual empty US/CAN NV130)(**Based on ASTM F558, measured at the hand vacuum, tested in Boost mode)(Based on Geomean of ASTMF2607 and IEC62885-2 (5.3 & 5.5) vs cordless market)( vs. original DuoClean nozzle)( vs. Shark Stratos IZ862H)( measured at the handvac in ECO mode)