Clicker counter is small, beautiful and accurate.contains 1 LR44 battery,With lanyard Long "ON/OFF" for 3 seconds to turn on the counter,turn off the counter, when the screen displays "0", and hold "ON/OFF" for 3 seconds to turn off Add/Subtract Counter, the "+" button to increment one number at a time, "-"to decrement one number at a time,maximum value of the display is "9999",When the display is "0", "-", it become "9999" To switch off/on clicker sound.Please sustained hold the green or red button down for 3 seconds. Various scenes:, warehouses, stations, streets, church,widely used in point tally of people or goods, statistics of the number of vehicles in public places, golf sports counting Colour:Black Material:ABS Size:5x4cm Package Contents: 2 * Counter Clicker Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.