Who is this retailer trying to target with this advertisement full of brownwashing? You'd get the impression that ethnic minorities make up 50% of the population by watching it, when in actual fact they are only 2% of the population in this area.
Derived from the more common 'Bluetooth', Browntooth is a standard communication format used by hobos and/or tramps.
Said vagrant will emit a rambling noise from their mouth indeterminable to anyone not 'Browntooth' compatible. Once the noise is picked up by a fellow rubbish-raider the two can communicate freely.