This handy timer features CDN's double time 2-in-1 technology. Its range is 20 hours by hr/min or 100 minutes by min/sec; you choose which timer you want at the click of a switch. Alarm sounds, lights and/or vibrates - again, your choice. Features a convenient 3 way holder: pocket clip/magnet/stand. Requires 2 AAA batteries (included). 5 year limited manufacturer warranty.