Timing is everything – high-visibility and loud alarm. Counts down Big digit Loud alarm Stop & restart 2-way mounting: pocket clip, magnet 20 hours by hr/min Battery & instructions included Housing Material: Food-safe ABS Battery: One AAA alkaline battery included Dimensions: 2.375 W x 3.5 H x 0.75 D in (6.0 W x 8.9 H x 1.9 D cm)