The MURPHY TACH ATH-40-A with Digital Hour Meter 20700254 is a high-quality tachometer designed for commercial trucks. Made in the United States, this product operates on a 12-24v voltage range and is a genuine part from the manufacturer. With awarehouse 159 location, this tachometer is a reliable choice for monitoring engine speed and hours of operation. This product is a must-have for any fleet or trucking company looking to keep their vehicles well-maintained and efficient.