No Batteries Needed: Don't worry about the clickers can't be used after a long time. These counters count up to 9,999 for a huge figure Lightweight and Portable: Made of ABS plastic, smooth for comfortable working. The meter is durable and environmentally friendly. Light weight can be convenient to carry it anywhere. Easy to use: 4-digit manual lap counter counts from 0 to 9999 and when you press once it counts as one. White numbers on black background, data can be easily read. The instant reset button is easy to use to restore zero. Color: mix colors (vivid colors). Package contents: 8 Finger Counters Usage: These tachometers are widely used for various occasions, eg, school, laboratory, competition, stadium, casino, party, meeting, bar, activity training and other events.