diff --git a/107.md b/107.md
index be21a7c..0bcac5b 100644
--- a/107.md
+++ b/107.md
@@ -34,7 +34,7 @@ The `device` can also push data such as sensor readings and updates.
 A `device` or a `user` can publish these event kinds:
 | Kind    |                  | Description                                                                                                   | NIP                                     |
 |---------|------------------|---------------------------------------------------------------------------------------------------------------|-----------------------------------------|
-| `4    ` | `direct_message` | Communicate between `device`(s) and `user`(s). The messages can be plain-text or JSON. | [NIP04](https://github.com/nostr-protocol/nips/blob/master/04.md) |
+| `4    ` | `direct_message` | Communicate between two `devices` or between a `device` and a `user`.<br/>The messages must be a JSON following the structure defined In this NIP. | [NIP04](https://github.com/nostr-protocol/nips/blob/master/04.md) |
 
 
 ### Event: Register a `device`