This is a timer that you can put in the socket for the H2Booster. The switch can be set to stay on for 1 to 10 hours, after which the electricity is turned off. This can be useful for people who want to use the H2Booster for very long periods, for example when sleeping. The H2Booster is then automatically switched off, and there is no risk of running out of all the water in the H2Booster, provided you start at a sufficiently high water level.
