BLACK+DECKER Lithium Robotic Vacuum with LED and SMARTECH™Model No: HRV425BL. Extra-large dustbin holds 2X more pet hair and dirt than the competition, so you can clean more between empties. Extra wide beater bar cleans more area per pass* than the leading robot vacuum in the market. Lithium Ion battery optimizes performance with up to 90 minutes of runtime. LED top cover flashes troubleshooting alerts to display the source of errors or maintenance needs. Conveniently program a cleaning schedule and control your vacuum with the BLACK+DECKER smartphone app. AUTOSENSE™ automatically adjusts suction power from hard floors to carpet, so you get more power when you need it and long battery life too. Select from three cleaning modes to fit your needs: Spot Clean, Quick and Auto or choose manual drive for full control of the cleaning area. Sensors detect stairs and other drop-offs.