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

# Underglow

> Free add-on — RGB underglow lighting for the CZ Autoz range: eight colours plus an animated rainbow mode, powered by a 9V battery.

**Callatic Vehicles Underglow** is a **free** companion mod for the CZ Autoz vehicle range. It adds a vehicle-mounted underglow controller with eight static colours and an animated rainbow mode — network-synced, so every player on the server sees the same glow.

<Note>
  Free means free — the Underglow mod has **no whitelist** and works on any server. Load it alongside any CZ Autoz vehicle mod. No Community Framework needed.
</Note>

## How it works

1. Attach an **Underglow Power Unit** to the car's **Underglow Module** attachment slot — the CZ Autoz cars all carry the slot.
2. Insert a standard **9V battery** into the power unit.
3. Use the vehicle's **Toggle Underglow** action to switch it on, and **Cycle Colour** (while the glow is on) to step through the palette.

|                   |                                                                                                                |
| ----------------- | -------------------------------------------------------------------------------------------------------------- |
| **Colours**       | Aqua · Red · Green · Blue · White · Purple · Pink · Orange — then **Rainbow**, an animated full-spectrum sweep |
| **Power**         | A standard 9V battery in the power unit — roughly **40 hours** of glow per battery                             |
| **Battery rules** | Won't switch on without a battery, and pulling the battery turns the glow off                                  |
| **Visibility**    | Network-synced to every player; renders day and night (best after dark)                                        |

## The item

|                   |                                     |
| ----------------- | ----------------------------------- |
| **Classname**     | `CZ_Underglow_Module`               |
| **Display name**  | Underglow Power Unit                |
| **Size / weight** | 3×2 slots · 0.5 kg                  |
| **Goes in**       | The car's **Underglow Module** slot |
| **Takes**         | A 9V battery                        |

## types.xml

The power unit only appears in your economy if you add it:

```xml theme={null}
<type name="CZ_Underglow_Module">
    <nominal>5</nominal>
    <lifetime>14400</lifetime>
    <restock>1800</restock>
    <min>2</min>
    <cost>100</cost>
    <flags count_in_cargo="0" count_in_hoarder="0" count_in_map="1" count_in_player="0" crafted="0" deloot="0"/>
    <category name="tools"/>
</type>
```

<Note>
  Example values — tune `nominal`, `min`, and `lifetime` to your economy, or sell it at a trader instead.
</Note>