I recently found this website, they advertise their products with Google ads. Let me start off by saying their company is totally fake, Bitmain Switzerland AG is not a real company name, there is no such company registered in Switzerland, neither in Germany. Their address is completely made up, they do not have an office there. There is no phone number you can call them, all you can do is write them an email and if you ask them questions about their company and location, they will not respond.
So please stay safe people and stay away from them!