The Time Timer MOD® is a 60-minute visual timer that has the style and durability of the Time Timer PLUS® in a size that's portable and easy to use anywhere. The MOD features a removable, silicone cover that offers an extra layer of protection from bumps and falls. The MOD also sports a clear lens over the red disk to protect the disk from sticky or curious fingers. Features an on/off switch for the audible alert, glare-free lens protects the red disk. Size: 3.5" x 3.5". One AA battery required for operation (not included). Choose from: Charcoal Grey, Lime Green or Sky Blue.