Self Charging Home Base Roomba returns to Home Base when it is finished cleaning. Home Base charges Roomba's battery in just 3 hours and is compatible with all Discovery Series Roombas. Virtual Wall Unit Keeps Roomba cleaning where you want it! Roomba Remote Use remote to power Roomba up, start a cleaning cycle, or direct it to the dirt. Joint the hundreds of thousands who've discovered the smarter way to clean. Senses, finds and eliminates dirt. Automatically adjusts to any floor surface: wood,tile,linoleum,carpet. Goes where other vacuums can't #1 CPR rating in the world. Lets you push a button,not a vacuum. Key Features Self -Charging Home Base self-charging Home Base when the battery is low or it has completed a cleaning cycle. This means your Roomba will always be charged and ready for its next cleaning mission. Active Dirt Response Roomba senses and finds dirt.Once dirtier areas are detected,Roomba automatically increases the intensity and focus of its cleaning. Cleaning Intelligence Just push a button an Roomba automatically calculates how long it needs to work to clean your entire room. Bagless Bin Roomba's bagless bin now holds three times more debris. Advanced Power System Roomba has a microprossesor-controlled charging system that provides up to 120 min of cleaning power.It recharges its battery in 3 hour,60% faster then the original Roomba. With the Adv. Power System,Roomba can clean up to 4 rooms before recharging. Proprietary Cleaning System Roomba's high-efficiency vacuum has a wide cleaning path,2-times more powerful suction and counter-rotating agitators to reach into your carpet and remove the dirt. the entire cleaning head automatically adjusts for both carpet and hard floor surfaces. Edge Cleaning Roomba's spinning sidebrush and wall Following technology team up to grab dirt and debris from wall edges and other hard-to-reach places.