1.Product height is 9cm used for cleaning the dirty place such as sofa and bed. 2.Unique triangle rolling brush is our proprietary product(10 x 10 x 800mm). 3.The vacuum clean and sweep function can work at the same time. 4.UV light kills the bacterium up to 90%. 5.Suitable for all kinds of floors. 6.Virtual wall is also our proprietary product. 7.With remote control function can change the operation direction. 8. Auto charging function. 10.Timed-cleaning cleaning time can be set. 11.Low noise is only about 55dB. 12.Five working modes. 13.With stair avoidance sensors.