Features: Meet various needs: This package comes with a set of 30 x Stopwatches. Whether it's to supply a sports event, a gym class, or just for a personal collection, this bulk pack of stopwatches is an efficient and cost-effective option, perfectly covering all your time needs. Specific Functionality: These small Stopwatches are strictly timer stopwatches and not lap counters. This functionality is designed to provide accurate timing rather than counting laps. If you are looking for a reliable stop watch that provides accurate timing, this is certainly a nice choice for you. Mute operation: Say goodbye to annoying buzzing sounds. Our stopwatch timer runs quietly without any alarms or beeps. These stopwatches are suitable for a wide range of users, including children and sports enthusiasts. Specifications: Material: plasticColor: blackSize: Stop watch: 1.2x1.5inch/3x3.7cm 1.2 x 1.5 inch/ 3 x 3.7 cmStrap: 4.06Inch/10.7cm 4.06 inch/ 10.7 cmPackage includes: 30 x StopwatchesNotes: Manual measurement, please allow slight errors on size. The color may exist a slight difference due to different screen displays. The battery life is related to the frequency and length of use of the product. If the frequency of use is high, and one-time use long, the battery life will be relatively short.