専用 is pronounced せんよう, with both kanji using their on'yomi. ぜんよう (voicing 専) or せよう (missing ん for 専 and long vowel for 用) are common misreadings. It denotes exclusive or dedicated use, for a specific purpose or person.
「専用 (せんよう)」は専も用も音読みです。「ぜんよう」(専の濁音化)や「せよう」(んや長音の欠落)は誤りです。特定の用途や人のためだけの使用を意味します。
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