A few hours... It is constantly listening. In terms of what other assistance can't do, it can integrate w/ my desktop computer in a way that other assistance c

A few hours... It is constantly listening. In terms of what other assistance can't do, it can integrate w/ my desktop computer in a way that other assistance can't easily do. The M$ voices take things to another level. Apple has better quality voices for Siri on desktop, but they don't let you access them through the 'say' command.