1-Megatron mechanical metal structure element  

2-3D gear mechanical structure details

3-3D mechanical pattern on the back

4-Metal chain 

5-Metal spring

-Artificial metal damping

7-Multiple red, blue, and black artificial wires

8-Hand-painted battle damage, highly restored details

9-A position reserved for storing Decepticons icon remote control 

10-3D TRANSFORMERS logo

11-Bluetooth speaker with good sound quality

12-Touch wake-up

13-Battery low voltage alarm

14-Lithium battery charging