If you have a Cisco IP phone assigned to you, you will also receive an audio file in your SFGov email of all voice messages you've received that you can forward or save and send later.

But if you don't, you use the native app pre-installed on your mobile device or you can download a free App like "Voice Record Pro". Voice Record Pro is an easy to use professional voice recorder. It allows you to record voice memos and on-site sounds at unlimited length with configurable quality. You have a number of options how you can send your audio file and also options to convert to a particular audio file type if needed. You can download this from the App Store or Google Play Store.