SHARK BU3521 Clean & Empty Cordless Stick Vacuum

Meet the SHARK BU3521 Clean & Empty Cordless Stick Vacuum—a self-maintaining cleaner that handles the messiest part of vacuuming for you. After each cleaning session, simply dock it on the charging base where it automatically empties itself into a sealed dust bin. No dust clouds, no dirty hands, no cleaning after you clean. The system captures debris in a sealed chamber and keeps fine particles out of your breathing space—up to 500x less dust exposure compared to traditional manual emptying. This redesigned Shark delivers practical versatility across your home's mixed surfaces. The auto-adjusting brushroll optimizes speed for deep carpet cleaning and directly engages hard floors without switching heads. LED headlights reveal hidden debris under furniture and in dark corners. The removable handheld component tackles stairs, upholstery, and car interiors with ease. Up to 40 minutes of runtime in ECO mode covers most whole-home sessions, while HEPA filtration and Anti-Allergen Complete Seal capture over 99.97% of dust and allergens down to 0.3 microns. This vacuum fits busy households, pet owners, and anyone who wants powerful cleaning without the maintenance hassle. At 12.3 lb, it's 30% lighter than Shark's Vertex Pro but heavier than basic cordless models—the trade-off for the auto-empty convenience. The quiet mode lets you dock and charge silently, saving the emptying cycle for later. If you clean frequently and hate dealing with dust bins, the BU3521's self-emptying system transforms the most tedious part of vacuuming into a hands-off process.