Dreame L20 Ultra Robot Vacuum Cleaner 3.5L (RLX41CEWH)

Type of dust collector:Dust bag
Dust volume (total):3.5L
Wet wipe:Yes
Automatic return to the base:Yes
Working time:260 min
Battery Technology:Lithium-ion (Li-Ion)
Weight:4.3 kg 
Automatic return to the base:Yes
Noise level: 63 dB
Stairs detection:Yes
Threshold height (max.):20mm
Water tank capacity:4.5 L
Easy cleaning_Yes
SMART technologies:Yes
Brush Type:Rotating brush
The function of working with Amazon Alexa:Yes
Working with the Google Assistant:Yes
Base station functions:Charging, Purification
Automatic garbage container cleaning_Yes
Obstacle detection:Yes
Edge Recognition:Yes