DIGITAL VOICE RECORDER
When preparing for the oral exam candidates will need a recorder. You can use your current smartphone or an old one (you probable have several stored in a junk-drawer) with a recorder. If you are planning to purchase a digital recording device, I've used the Sony stereo digital voice recorder for many years with excellent results. It costs about $89. It's easy to use and has great recording quality and sound output. The digital recorder does not come with an external microphone and one is not really necessary. However, if you want an omni-directional microphone, you will need to add about $20 to the price.
Note: To prepare for the oral exam you will need a voice recorder, CD player with speakers, over-the-head earphones, notepad, pen or pencil, stopwatch, calculator, and a quiet space to work and keep your equipment. If you use features or apps from your computer and/or smartphone remember that multiple features will need to be operating at the same time.