# Viber Business Messages channel properties

There are Viber Business Messages channel-specific properties that can be used when making calls to the Conversation API. These properties can be listed under `channel_properties` in the message request.

For example, below is the code for adding the channel specific property `VIBERBM_TEMPLATE_MESSAGE_DEVICES` to a Conversation API call:


```json
{
  "app_id": "{{APP_ID}}",
  "recipient": {
    "contact_id": "{{CONTACT_ID}}"
  },
  "message": {
    "template_message": {
      "channel_template": {
        "VIBERBM": {
          "template_id": "0aac888f-2ee2-4112-9659-1755a951966a",
          "language_code": "en",
          "parameters": {
            "pin": "1234"
          }
        }
      }
    }
  },
  "channel_properties": {
    "VIBERBM_TEMPLATE_MESSAGE_DEVICES": "ALL"
  }
}
```

The relevant Viber Business Messages channel properties are detailed in the table below:

| Property name | Property value |
|  --- | --- |
| `VIBERBM_TEMPLATE_MESSAGE_DEVICES` | Defines the devices to which a template message should be sent. Possible values: `PRIMARY_ONLY`, `ALL` |