Made of ABS plastic, dimensions: 5.2 x 4.3 cm. Color: Black Yellow Green Blue Pink Orange Red White (8 pieces) Instant reset button allows you to hang your finger easily used as zero and comfortably between your fingers. Compact and portable design, it comes with a metal ring for carrying or attaching to a key ring, made of stainless steel; fits perfectly in the hand No batteries required and counts up to 9999 for huge numbers. Just takes a few turns after the reset to be easy and quick, without having to cycle through 9999. Easy to use and works as expected. Widely used in various occasions, such as school, laboratory, competition, stadium, casino, restaurants, bars, training activities and other events. Function: 8 digits from 0000 to 9999 counts. Easy to use rotary knob - reset. No batteries required, user-friendly reset button and GIANT grip hole for on-hand comfort. Widely apply to all statistics occasions and press the button as fast as you can. Never again skipped a beat and are 100%. material: ABS plastic and stainless steel case