diff --git a/3d-printed-enclosure.md b/3d-printed-enclosure.md
index 8641813..809bde4 100644
--- a/3d-printed-enclosure.md
+++ b/3d-printed-enclosure.md
@@ -1,6 +1,14 @@
+# Design
+
+The first enclosure was made around march 2020, combined with the first versions of this firmware. For technical information about this check [here](H2-Enclosure).
+
+<img src="https://github.com/user-attachments/assets/102c88ff-5a13-42cc-8c60-110ea417e959" height="300">
+
+# H2
+
 Many PortaPacks on AliExpress come with a metal or plastic enclosure.  Enclosure dimensions, simplicity of assembly/disassembly, connector labeling (if any), and speaker hole positions (if any) varies by supplier.  Some users feel that a metal enclosure is safer for devices that contain LiPo batteries.
 
-You can 3D-print the following enclosure for your Portapack (click the pictures to get the design files):
+You can 3D-print the following enclosure for your Portapack:
 
 [<img src="https://raw.githubusercontent.com/portapack-mayhem/mayhem-firmware/master/docs/images/h2_front.jpg" height="300">
 ](https://grabify.link/I77NC0)
@@ -24,17 +32,19 @@ If you need a different design, or material, check more options directly in [Ali
 
 For a comparison between the results of the different fabrication techniques, check: https://youtu.be/lB-vc-Y13PM
 
-# Assembly
+## Assembly
 Check the `assembly.pdf` from the [case files](https://www.thingiverse.com/thing:4260973/files) for instructions.
 
-## Speaker
+### Speaker
 
 You can easily place a small speaker inside. There is no holes in the case but it seems that the sound quality actually improves with the case:
 https://www.youtube.com/watch?v=XkaGV9muvbg
 
 Check more details about the speaker (details and wiring) [here](Internal-speaker).
 
-# H4M version of the enclosure
+# H4M
+
+This version includes a new knob, switches and other refined features, while keeping the compact size:
 
 [<img src="https://github.com/user-attachments/assets/12daecf6-d014-429b-b5c5-b12f9fd1f891" height=300/>](https://www.printables.com/model/1019145-official-hackrf-portapack-h4h4m-case)