しょう電力 でんりょく機能 きのうではありませんでした
shō denryoku kinōdewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 省電力機能

1. Was not a power-saving function.; Did not have a power-saving function.

Past/Perfective
Negative
Polite
Formal Register
Computing