Way of knowing whether your "Gmail" is open from somewhere else

Allows Google Inc. in the e-mail service "Gmail" feature does not know most of the users of Gmail, and this feature is the possibility to know the task that has been places where the use of open and Mail of which Gmail

.

 And find out if the account in "Gmail" is open from somewhere else, all you have to do is open your account in the "Gmail" and then I go to the bottom of the list of messages, then click on
Details

Will open a new window containing new information about your account activity in the various devices.

In this window you see
In the "Access Type" box type of access, whether on the web browser or mobile phone.
In "Locaition IP Address" box IP address, who scored it in to your account.
In "Date Times" box is the time that you are logged in and the duration of its stay inside the account.

And therefore, if you notice any activity that has nothing to do with you, you must change the password on your account.