It's pretty straightforward
Voice over might just be the least complicated part of audio production. The hard part of recording is already done. We just make it sound nice.
Delivery is usually within 24h.
Voice Over Mastering
Assembling all tracks, incl. music
Industry standard audio leveling
Industry standard target levels
Making music "duck" for speech
Removing noise/hiss/clicks/plosives/room tone
Taming loud peaks
Price / hour of submitted audio