Meet the Crenova Robot Vacuum Cleaner: a smart little robot with high suction power and automatic height-adjustment capability to perform deep cleaning. It has 5 cleaning modes and a rechargeable battery that lasts 90 minutes.
The robot uses laser navigation and ultrasonic sensors to avoid obstacles and stairs and clean along walls. It offers 55 dB quiet operation. The included virtual wall lets you block off certain areas. Costs under $300 at this time.