Well, you COULD read the manual
If you don't have a manual you COULD find the make and model number and do a Google search FOR YOURSELF to find one, then read the manual.
If you really can't be bothered you could post on a forum like this and wait till someone asks you to tell them the make and model and wait again until someone comes along prepared to do the search you could have done.
Anon
July 2016
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