The space continuums adjust to every size needed. It allows you to go back in time to any period for one week. Warning, if shoes are taken off during the vacation, you will be sent back to your time. Things go wrong in the future or past? Simply take them off and return to current time no problem.  To use the shoes you must have a charge in them. The shoes are charged at CA Enterprise. Once your SPACE CONTINUIMS are charged your able to travel through time. There are  two buttons on the shoes. One on either side.  For safety measures. You must click both of the buttons down for 10 sec for the shoes to become active. A dial of 8 separate number dials will be on the side. Put in the year you would like to go! For example,  After your shoes are charged, click down both buttons on your continuums for at least 10 sec for the shoes to be taken off safety mode. The end of the shoe will start to glow, put in anytime on the side dials (Ex: 08-24-1888). All it takes is one jump and as soon as you hit the ground you will travel through time!