Clip to your key chain or belt loop and have it available whenever you need a stopwatch. Despite its low price and miniature size of only 2" x 1 ½" x ½" (55 x 35 x 15 mm), Clip-On Stopwatch is a full function stopwatch packed with features including: Single event, start/stop and lap functions 1/100th second resolution Calendar Thermometer in ºF Compass. Counts up to 24 hours. Although tiny and weighing only 1 oz (27 g), Clip-On Stopwatch's large LCD and buttons make it comfortable to work with. One button cell battery is included.