1、EFFICIENT CLEANING: Lithium vacuum cleaners have powerful suction and efficient filtration systems that can quickly and effectively remove dust, dirty and pollutants from your home 2、EASY TO USE: Lithium vacuum cleaners do not need to be plugged in, only need to be charged to use, cordless design for simple home cleaning, you can easily clean all kinds of corners and hard to access places 3、LIGHTWEIGHT AND PORTABLE: Lithium vacuum cleaner is compact, lightweight, easy to carry and operate, and can be cleaned anytime and anywhere 4、MULTI FUNCTIONAL DESIGN: Lithium vacuum cleaners come with 4 types of suction heads and accessories for different cleaning needs, such as floors, furniture, curtains, etc. 5、ENERGY SAVING: Lithium vacuum cleaners do not produce waste air and noise, more environmentally friendly than traditional vacuum cleaners, energy saving 6、APPLICABLE SCENARIO: The cordless leaf blower is suitable for BL1830B-2, BL1850-2, BL1850B-2, BL1840B, BL1820B, BL1860B-2, BL1830, BL1840, BL1850, BL1860, BL1815, BL1430, BL1450, BL1440, etc battery interface Item Type: Cordless Vacuum Cleaner Material: ABS and PC Battery: 1 x 21V Lithium Battery, Battery Capacity: 4000mAh Dust Cup Capacity: 730ml Maximum Suction: 8000Pa Continuous Use Time: 1st Level(silent mode): 80 Minutes; 2nd Level(normal speed mode): 40 Minutes; 3rd Level(high speed mode): 25 Minutes; 4th Level(maximum speed mode): 16 Minutes Battery: 1 x 21V lithium battery(not included) Applicable Battery Port: for BL1830B-2, BL1850-2, BL1850B-2, BL1840B, BL1820B, BL1860B-2, BL1830, BL1840, BL1850, BL1860, BL1815, BL1430, BL1450, BL1440, etc. 1 x Host 2 x Filter Accessories 4 x Suction Head 1 x Connecting Pipe 1 x Connect Hose 1 x Adapter 1 x Battery 1 x User Manual