With the LED retractable keylight you will never be left in the dark again trying to find the right key. With the just a push of a button the super bright LED will allow you to find the right key and see all obstacles in your way. The LED keylight also has a 10 inch retractable cord with keyring and a handy belt clip. The LED retractable keylight requires 2 CR2016 lithium batteries that are included. The LED retractable keylight measures in at 3 inches x 1 and a quarter inches x three-quarters inches. The LED bulb will never need replacing. The cover colors may vary from the one pictured.