This is a used JBT Model 15-FHAC frequency meter designed for 60 and 400 Hz systems. The 2-inch panel meter is suitable for industrial or technical applications where monitoring AC frequency is required. Its specific frequency ranges make it a practical choice for environments using standard 60 Hz power or specialized 400 Hz systems, such as in aviation or certain manufacturing settings. Free shipping is available for this item. As a used instrument, it is sold in its current condition. Potential buyers, such as technicians or equipment maintainers, should consider its compatibility with their specific panel cutout and wiring requirements. Check the listing for full details on the meter's operational status and any included accessories. JBT Model 15-FHAC 60 & 400 Frequency Meter 2" Panel Meter. Condition: Used, Made in United States. Listed at 25.00 USD.