noun which may take the genitive case particle 'no'
electric-powered; electrically operated
Used as a no-adjective to describe devices or systems that run on electricity, often in contrast to manual or fuel-powered alternatives.
この電動式の歯ブラシはとても静かだ。
This electric toothbrush is very quiet.
電動式の窓はボタン一つで開く。
The power windows open with just a button.
手動式 means 'manual type', the opposite of 電動式.
Compound of 電動 (electric drive) + 式 (type, style).