Photo sensor detects stairs to avoid falling down Stop automatically and making warning beeping when wheel gets stuck Easy roller brush removal for cleaning Debris level is visible via dust bin window Five-step repetitive rotation movement provides the most effective way to clean your rooms Timer for cleaning time setting Built-in slot to put fragrance for odors removal Three washable filters to reduce cost of ownership Move out from underneath furniture (dark area) when it is low on power or has ended it's cleaning job NiMH 2500 mAh battery: 500+ recharging cycle Noise level: 80dB at distance of 20cm Suction capability: Vacuum fan speed 5.2 meter/second Capacity of dust bin: 0.3 liter Cleaning capability: 30 minutes at area of 4.8m x 3.2m Unit Dimension: 14"x3.6" Box Dimension: 22"(L)x6"(W)x17"(H)
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