N79W provides a versatile cleaning solution for hard floors and carpets. With the Smart Motion system, a runtime of up to 120 min, and multiple cleaning modes, N79W efficiently cleans your floor and has an appropriate cleaning mode for every job. You can also control your robot with ECOVACS App or with Amazon Alexa and Google Assistant, and enjoy all the convenience! Hardwood Recommended for use on hardwood floors. Bagless Easily dispose of dirt and debris without a vacuum bag. Cordless Powered without a cord for freedom of use Multi-surface Can be used on many different surfaces. Battery Power Source Product is powered by battery App Based Utilize the product brand App to connect with your smart robot to clean from your phone, tablet, at home or away. Smart Home Voice Control Use voice commands to control the product using popular smart home voice devices such as Alexa and Google Assistant. Self-mapping Enables the smart robot to map your house by room or area, giving you control to choose which rooms/areas you want to clean. Scheduled Cleaning Input an automatic cleaning schedule for your robot when its most convenient for you and the robot will clean at those times.