diff --git a/README.md b/README.md
index df188fd..f0c8d83 100644
--- a/README.md
+++ b/README.md
@@ -102,6 +102,7 @@ See [using the package](docs/usage.md).
 | `ray(…).blue()` | Output in color. Use `green`, `orange`, `red`, `blue`,`purple` or `gray` |
 | `ray().clearScreen()` | Clear current screen |
 | `ray().clearAll()` | Clear current and all previous screens |
+| `ray().className(obj)` | Display the classname for an object |
 | `ray().count(name)` | Count how many times a piece of code is called, with optional name |
 | `ray().disable()` | Disable sending stuff to Ray |
 | `ray().disabled()` | Check if Ray is disabled |
diff --git a/docs/usage.md b/docs/usage.md
index 1b2f974..c96b64e 100644
--- a/docs/usage.md
+++ b/docs/usage.md
@@ -167,6 +167,16 @@ Ray can display information about an `Error` or exception with the `error` metho
 ray().error(new Error('my error message'));
 ```
 
+### Displaying class information
+
+You can display the classname of an object with `className()`.
+
+```js
+const obj = new MyClass1();
+
+ray().className(obj);
+```
+
 ### Feature demo
 
 Here's a sample script that demonstrates a number of the features, both basic and advanced.