> ## Documentation Index
> Fetch the complete documentation index at: https://docs.skill3d.work/llms.txt
> Use this file to discover all available pages before exploring further.

# Voice coach

> Hands-free coaching with live camera and microphone.

# Voice coach

The voice coach is the core of Skill3D: a live AI session that **sees** your camera feed and **hears** you speak.

## How a session works

1. You start a coaching session and grant camera + mic.
2. Skill3D connects a low-latency live model session.
3. You talk about the job; the coach replies by voice.
4. The coach can also:
   * Draw **highlights** on objects in the frame
   * Update the **HUD** with short step text
   * Call tools (research, visualization, etc.) when needed

## Tips for better coaching

* **Light the scene** — dark or blurry frames confuse the coach.
* **Hold steady** for a second when asking about a specific part.
* **Name the object** — “this left bracket” beats “this thing.”
* **One question at a time** — short turns keep answers sharp.
* **Safety first** — if something looks hazardous, stop and escalate.

## HUD & highlights

| Feature          | What it does                                                                            |
| ---------------- | --------------------------------------------------------------------------------------- |
| HUD card         | Short instruction over the camera (glanceable while hands are busy)                     |
| Object highlight | Animated box around what the coach is referring to                                      |
| Tap-to-ask       | You tap the view; the coach identifies that spot — see [Tap to ask](/guides/tap-to-ask) |

## Credits

Voice usage is metered from **actual model tokens** while the session is active and processing. Silence and idle connection are designed not to burn credits the same way active conversation does.

See [Credits](/billing/credits) for rates and packs.

## Ending a session

Use **Exit** in the header. Your conversation is archived to History when possible, and verified milestones remain in your account.