diff --git a/qim3d/generate/collection_.py b/qim3d/generate/collection_.py
index a776bfb66b1343d694e75777d1a7c880b46d83cc..2e78633f30b83782ad95063c6ca9bf3a5a9e189b 100644
--- a/qim3d/generate/collection_.py
+++ b/qim3d/generate/collection_.py
@@ -171,8 +171,8 @@ def collection(
 
 
     Returns:
-        synthetic_collection (numpy.ndarray): 3D volume of the generated collection of synthetic blobs with specified parameters.
-        CC (object): A ConnectedComponents object containing the connected components and the number of connected components found in the collection.
+        synthetic_collection (numpy.ndarray): 3D volume of the generated collection of synthetic objects with specified parameters.
+        labels (numpy.ndarray): Array with labels for each voxel, same shape as synthetic_collection.
 
     Raises:
         TypeError: If `collection_shape` is not 3D.