oh sorry guys!! I missed these australian shower timers, https://showertimer.co.nz/
they are very popular in the US, AU and Nz but as far as I have been able to find out, the solenoid is not inside the timer as with the Acqua Tempus (Spanish) so we will need plumbering if we buy the Australian one, besides, it is not suitable for all showers
any one has tried it yet?