"Material: Made of plastic, durable, beautiful appearance, fast response, light weight, easy to store and carryEasy to use: The needle counter can count up to 9999, you only need to turn the knob next to it counterclockwise to reset it to zero, and there is a zero override switch on the right side for resettingEasy to carry: Each handheld counter is equipped with a metal ring that can be placed on the thumb for a comfortable fit, allowing you to use the handheld counter anytime, anywhereNo batteries required: Our handheld counters are purely manual and accurately display 4 digits. The handheld counters also do not require batteries, so there is no need to worry about power issuesWide range of applications: It can be used in a variety of environments such as schools, laboratories, competitions, stadiums, golf, sports events, restaurants and bars, training events and other activities"