Nite Ize SKE17-03-02 SeeKey, Lime Plastic/White LED Push button on/off switch Battery run time in glow mode is 20 hours and in flash mode is 25 hours Product takes 2-2016 3v lithium batteries and are included Available with white LED shining through either lime green or clear/white plastic Product dimensions are 4.05-Inch x 1.33-Inch x 0.86-Inch