When K passes his baseline test at the beginning of Blade Rrunner 2049, the interrogator says, "You can pick up your bonus." In the next scene, he brings home an emanator for Joi.
Someone on the Internet suggested (I don't have the patience to find the link at the moment) that the emanator is K's bonus. If that's so, it implies that LAPD knows an awful lot about K's inner life. This would make sense since the Replicants are kept on a short leash (and Gaff even appears to know about Deckard's unicorn dream in the first film), but it's still creepy.
The other explanation would be that they gave him a more standard cash bonus, and he went shopping on the way home. Is there any direct evidence in the film itself, or in any ancillary materials, to support one reading over the other?