Cheap - under $500
Durable - run for up to 2 hours
        - water resistant
Sensible - should detect objects at least 2-3 cm in diameter
         - differentiate between objects (human and inanimate)
Limited speed - less than 5km/hr
Clean - at least 95% of the dust
Automated - runs on a schedule
Stores dust - up to 2L
Multifunctional - for small (1cm) and large areas (up to 100cmx100cm)
Modular - replaceable parts
Small - less than 30cm in diameter, 10cm in height
Indicators - power on/off, WiFi connect
App - musical playlist from phone, etc...
    - start/stop
    - dock
Docking station - fully power the vacuum in 4 hours.