?Ipx 7 Waterproofing, More Highly Powerful Cleaning Efficiency Up To 500Rpm/S?? One-Button Design That Is Equipped With Advanced Dual Moto, Its Work Performance Has Been Boosted A Lot, 400-500Rm/S Can Be Selected Upon Your Need.Easier To Handle Any Cleaning Task With More Ease And Efficiency | | ?Adjustable Length And Angles Up To 90?: Compared With Other Competitors,The 90 Adjustment Ensures All-Round Cleaning For Tiny Corners, Which Makes It Easier To Clean Hard-To-Reach Areas. No Need To Kneel Or Bend Over, Caring For The Elderly And Those With Lower Back Pain. | | ?Longer Work Time With 4000Mah*2 Battery?:The Upgraded 4000Mah*2 Battery Has Greatly Prolong Continuous Use Time Up To 3-4 Hours On A Single Charging.Please Note 4000Mah Battery Is The Biggest Volume In The Market. And Only 3H For Full Charge | | ?More Thicker Steel Retractable Handle?: More Strengthened Steel Rod Ensures Its Longer Life Time, Even Under Extreme Circumstance, It Will Not Bend Easily,And Never .