4-LAYER EFFICIENCY FILTRATION SYSTEM Cyclone technology combined with high-density filter in cordless stick vacuum clean up to 99.99% of fine dust and particles and prevent secondary air pollution, provide you with excellent cleaning experience. Note: filter can be washed and detached and there is an additional filter. CORDLESS & LIGHTWEIGHT & MULTIFUNCTION The cordless design of vacuum cleaner allows you to get rid of the trouble of cords and hold the cordless vacuum cleaner with one hand to clean. After replacing the multifunctional brush, it can be quickly switched to a handheld vacuum cleaner which is very suitable for sofas, car, keyboards and gaps.