Tri-Brush System combines side brushes, channel brushes, and a multi-surface brushroll to handle debris on all surfaces. Shark ION Robot senses ledges and stairs, avoids damaging furniture and walls, and maneuvers around potential stuck situations, truly knowing your home. SharkClean app lets you start and stop cleaning and schedule your robot to clean whenever you want. Use Amazon Alexa or Google Assistant to easily make the robot clean at your command in your connected home. Whole-home, floor-to-carpet cleaning for up to 2 hours. Shark puts their robots through rigorous testing, performing thousands of hours of real-life use to give you a reliable, ultra-powerful clean.