Check the listing for details. Kessler-Ellis 12V DC 6 Digit Impulse Counter Mechanical Wire Leads Base VDC KEP. Condition: New. Listed at 9.95 USD. Kessler-Ellis KE610RPB Impulse Counter 12 Volt DC, 6 Digit Mechanical Attributes: 12V DC Voltage, 2 Watt Power Draw Max Count Rate: 10 cps Non Resettable Counts Up to 999,999. Increment of one digit with each 12VDC pulse it receives. 10" Flexible Insulated Wire Leads Mounting Base with four holes on 1.875" x 0.6875" centers Mounting Bracket, Removable Size: 61mm high x 34mm x 26mm NOTE: Some of these units were spot-tested after manufacture by the company Quality Control Inspector and may have a few counts registered on the readout as a result of that testing. This does not make them "Used", but rather marks them as having been Pre-Tested prior to leaving the factory. Some also have counts pre-set by the manufacturer that may be 100 to 200 counts away from rolling over to a count of 000000. This is to give the installer some counts to play with when testing their counter installation.