# Script Variables

ObjectNet provides the facility to automatically synchronize variables across the network. This can be very useful to avoid a lot of events to keep objects updated.

Network Variables are synchronized from <mark style="color:purple;">Active to Passive</mark> instance, this means that a variable modified on the Active instance will be sent over the network and applied on all Passive instances.

Script Variables tap can be open/close by clicking on the variables icon.

A list of all variables on the main NetworkObject component shall appear and you can enable/disable any script variable.

<figure><img src="https://content.gitbook.com/content/NG75ky1pR1kRokWLRnzy/blobs/I2VcEGgABa87jAUHGw8O/image.png" alt=""><figcaption></figcaption></figure>

By flagging the check box you can enable variable synchronization across the network.

{% hint style="danger" %}
Network Variables is available only for scripts inherited from NetworkBehavior, if the script was not inherited from NetworkBehavior is not possible to synchronize variable values ( see [network-variables](https://onlineobject.gitbook.io/objectnet/general/network-behaviour/network-variables "mention")).
{% endhint %}

Check [#variables-deliverymodes](https://onlineobject.gitbook.io/objectnet/network-behaviour/network-variables#variables-deliverymodes "mention") to learn more about the diffrence between Reliable and Unreliable variables and when to use them