It appears they need to be paired to your phone every time you plan to use them. Many thanks! Not turning on meant that the circuit board blew and it advised to call support, which I did. The Cons:Battery life. I’m a big fan on Bernie Mev’s And this color is so neutral- They’ll go with many colors. Overall a great shoe. I struggled with several pair of Crocs that did not fit my toe box (arthritic toes), until I finally found these! 10 Team and Jet 7 very much. It makes my arms look slimmer and I am so happy. Let me start by saying these covers are adorable.