Ecovacs N79S Robot Vacuum Cleaner with Max Power Suction, Alexa Connectivity, App Controls, Self-Charging for Hard Surface Floors and Thin Carpets. Alexa smart app controls: use alexa voice commands to direct cleaning. Use the app to personalize, schedule monitor cleaning sessions, accessory status, receive error alerts. 5 Cleaning modes: smart motion guided auto-clean mode, plus single room spot mode for targeted cleaning, edge mode for hard-to-clean edges, max mode for high-power cleaning. 3 Stage cleaning system: high-efficiency vacuum suction, deep reach helix main brush wide reach side brushes.