CleanMate QQ2 Plus is the enhanced model of QQ2. You can define QQ2 Plus or QQ2LT unit daily cleaning scheduling time up to 7 days per week. That means all cleaning will be done automatically according to your set up day and time. It can easily handle various surfaces including carpet, hardwood tile and linoleum. It can also go underneath the beds and other hard-to-reach places to clean dirt, dust and pet hair while simultaneously killing bacteria and deodorizing with its ultraviolet light. With Cliff Sensing technology built-in, CleanMate intelligently avoid stairs and ledges. CleanMate can work ceaselessly up to 70 minutes on a single charge.