The Vintage Sperry Snap 8 Model SPR-300 Clamp on AC Volt OHM Ammeter is a handheld multimeter designed to measure AC voltage with its clamp feature. Made in Japan, this analog display device offers reliable and accurate readings for electrical testing and measurement tasks. The Sperry brand is known for producing quality electrical instruments, making this ammeter a valuable tool for professionals in the field. I am not sure how these work so you are buying as is. Look at the pictures and decide for yourself. Email me with any questions