瞬間 しゅんかん湯沸 ゆわかし でしょう
shunkan yuwakashikideshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 瞬間湯沸かし器

1. Probably an instant water heater.

Polite
Presumptive
Conjecture