H7EC-6 automatic digital electronic hour meter without voltage .6 digit display meters with electrical s without voltage input isDisplay: LCD displaySet: reset panel or terminalSignal input: or voltageMinimum counting signal: H7EC-6 (8)-50ms (10 times/s)Power supply: internal powerCount: 0 -999999 / 999999999Ambient temperature: minus 10 degrees to 40 degrees C (but not freezing state)Operating humidity: 35-85% RH Size: 4.8cm(1.89in) × 4.5cm(1.77in) × 2.4cm(0.94in) Features:Internal self-powered, no external 6 or 8 LCD displays, large and clear displayLeft side panel with lock to prevent misuseYou can input a signal or the number of signals is accurate and reliableMaximum counting rate 60 seconds/second, 200 times/secNo mechanical wear, long service life alternative to electromagnetic counterNote: Please allow 1-3cm error due to manual measurement. Make sure you don't mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package Included:1 x Electronic Counters