A talkbox is a small speaker in a sealed box with a tube that you put in your mouth. The box usually sits on the floor, with the tube held onto a mic stand. You use your mouth to 'shape' the sound, and a microphone takes that sound to the PA system.

So, you need:

- An amp to drive the talkbox speaker.
- A mic stand.
- A microphone.
- A PA system and cables.