Please send size message after placing order 6-digit display counters electrical contacts without voltage input comesDisplay: LCDReset: reset the panel or the terminalSignal input: contact or voltageMinimum count signal: H7EC-6 (8)-50ms (10 / sec)Color: as shownMaterial: PlasticPower Supply: Internal PowerCount : 0 -999999 / 99999999 temperature: 10 degrees to 40 degrees C ( not freezing state)Operating humidity : 35-85% RHSize: 4.8cm(1.89in) x 4.5cm(1.77in) x 2.4cm(0.94in)Features:Internal self-powered, no externalPanel on the left with a lock to prevent misuseYou can enter contact signal or signals count is accurate and Maximum count rate of 60 seconds / second, 200 / secNo mechanical wear, to electromagnetic counterePackage Contents:1 x Digital Electronic CounterOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.