Why can't you choose breathing options, heating, and EVO at the same time?

For WM Doll, YL Doll, Jinsan Doll, and OR Doll(from Jinsan company), you can only choose only one of the three functions: breathing option, heating, or EVO skeleton.

Breathing function & heating: There are heating wires in the heating device and a battery in the breathing device. Firewire plus battery, it will explode!

Breathing function & EVO skeleton: To install breathing equipment, we need to ensure that there is enough space inside the doll's body. The EVO Skeleton's shoulder shrugs compress the interior. If you choose these two functions and want to keep the breathing option, we will remove the shrug feature from the EVO skeleton and keep the double joint for you.

Heating & EVO skeleton: Shrugging can cause the heating wires to rub against each other and may damage the wires. If you choose these two functions, we will remove the shrug feature from the EVO skeleton and keep the double joint.