The counter is small, attractive, and accurate. It includes one LR44 battery and a lanyard. Press and hold the "ON/OFF" button for 3 seconds to turn it on. To turn it off, when the display shows "0," press and hold the "ON/OFF" button for 3 seconds. For increment/decrement, press the "+" button to increment by one and the "-" button to decrement by one. The maximum displayed value is "9999." When the display shows "0," press the "-" button to display "9999." To turn the counter's sound on or off, press and hold the green or red button for 3 seconds. It has various applications: warehouses, stations, streets; widely used for counting people, tracking the number of vehicles on public roads, and counting at sporting events such as golf. Color: Black. Material: ABS. Size: 5 x 4 cm. Package contents: 2 click counters. Only the listed package contents are included; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. The measurement allowed error is +/- 1-3 cm.