if you don't use it at home when you do the practice tests, then don't bring those stuff on a test day. because you might feel uncomfortable. also make sure the staff at the test center know what they are. you don't want them to consider you are using technological device to cheat. just want to remind you about that, because they can ask you to leave the test center anytime by any reason. good luck...you are gonna be fine. don't worry too much