Is this wall plate suitable for audio/video applications as well as ethernet and voice?

Yes, this wall plate is suitable for audio/video applications as well as ethernet and voice.

Is this product easy to clean and maintain?

Yes, the product is described as rugged and easy to keep clean.

Yes, this wall plate works with any keystone jacks or keystone inserts.

Yes, this wall plate will mount to any electrical or surface mount box.

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C2G/Cables To Go 37094 Two Port Keystone Single Gang Wall Plate - Stainless Steel

Designed for ethernet networking, data, voice, audio/video, fiber optic, and other applications
This stainless steel wall plate is designed with a plastic spacer that makes the keystone jack appear flush to the face
A space is even provided for identifying stations
Compatible with NEMA standard openings and boxes
This wall plate will mount to any electrical or surface mount box, and work with any keystone jacks or keystone inserts