Hello and welcome to our forum.
The image shows a Thermasol One-Touch control which has been discontinued and the generator this worked with is discontinued as well.
Thermasol had a product change about 5 years ago.
To get you steaming, you would need a new generator and control.
Provide us with your shower dimensions and wall material and we will help size you into the appropriate model's kilowatts. Contact a Project Coordinator at 800-707-2862
I found a Thermasol Pro 240 with touch control. I have all the plumbing and electric in place. Just need to hook the generator and replace the control in the bath. How much should the instillation run for this project? Thanks!