1.    Non-marring bumper
2.Sensor avoids stairs or being stuck under furniture
3.Touch-sensitive bumper senses obstacles as it vacuums a room
4.Automatically adjust to different floor surfaces
5.Maintains same constant cleaning power
6.80-minute rechargeable Ni-Cd battery
7.Picks up fine debris and pet hair
8.Cleans wood, slate, tile and low to medium pile carpet
9.ravels through several cleaning patterns to ensure the entire room is clean
10..Three timer settings runs from 10to 80 minutes, allows users to select how long they want 
    to clean
11.Uses infrared for sweeper prevents Auto Sweeper from falling down stairs
12.Designed with light sensor Auto Sweeper, cleans even under sofa or bed
13.Designed with nonstick hair brushes
14..Cleaning route includes 5 different patterns, Special bounce,  Spiral, Along the
wall , Polygonal spiral and S shape
15.with Auto Rechargeable device:when the Vacuum Cleaner battery power is not enough, The Vacuum Cleaner will auto look for the Auto Rechargeable device and  Auto Rechargeable battery then auto working