These are the Standard Features with All ILIFE Models: Cliff sensors: There are 8-10 cliff sensors underneath to detect stairs / cliff, which stop robot from falling Auto Recharge: Once cleaning is finished or battery discharges, it will go automatically for docking Scheduling: Cleaning can be scheduled at specific time HEPA Filter: All ILIFE Cleaners have HEPA (High Efficiency particulate air) filter to arrest very fine particles for efficient cleaning Front Bumpers: There is a front bumper to reduce nicking or scuffing against the furniture App/Remote Control: All ILIFE robotic vacuum cleaners are equipped with remote control Front Bumper: Front Bumper ensures to reduce the impact after sensing any closeby object by reducing the speed of cleaner.