Check the listing for details. JR-HM011F Self Powered Digital Tachometer Hour Meter,Resettable TOT Hours,Cou.... Condition: New – Open box. Listed at 18.99 USD. Open box item - brand new. Introducing the JR-HM011F Self Powered Digital Tachometer Hour Meter by Jayron. This device comes in a compact 2.91x2.83x2.05 inches package and weighs 0.25 pounds. It is a highly accurate meter that measures the rotational speed of an engine and tracks the total run time of the engine. The meter is resettable and can be easily installed on any engine. This versatile tool is perfect for those in the business and industrial sector, specifically for those who need to measure the rotation speed of their machines and engines accurately. The JR-HM011F is designed to cater to the needs of people looking for a reliable and precise tachometer hour meter. Shipped with care from the Eastern United States via USPS.