Intelligent Vacuum Cleaner,Auto Vacuum Cleaner,Best Vacuum Cleaner 1. Material:ABS,PC,PA6 ... .7cm9. Battery:Ni/MHFeatures of Vacuum Cleaner Robot : 1. Auto cleaning and Auto-charging2. Charging time can be set3. With stair avoidance ... Robot Cleaner pls contact "doris" (skype:doris10572) Intelligent Vacuum Cleaner,Auto Vacuum Cleaner,Best Vacuum Cleaner