электронные счетчики

This hand tally counter records everything from 0000 to 9999.Operration instructions: 1)To turn on: Press on/off/reset button; the unit will display 'o' 2)To reset: Press and hold the on/off/reset buton until display shows'o' 3)To turn off: Press and hold no/off/reset button when the display is at 'o' 4)To count: Press and release the count button, it will beep each count if sound is on 5)To switch the sound off or on: Press and hold count button until the unit beepsBattery information: -Replace the battery when the display get dim -Battery type: AG10 1. 5v button cell -Observe polarity(+/-)during replacement -Do not over tighten the crews -Ensure rubber ring is placed in the groove accurately to achieve a water tight sealelectronic counters,visitor counter,visitor counter::