This is a diving regulator. - Gauge type: Pressure gauge, depth gauge Used for a few times over a period of 3 years. It was overhauled approximately 5 years ago. It has not been used since the overhaul, but it was used before that, and since it has been overhauled, it is listed as "slightly scratched." This is a used item, so please check its operation and perform maintenance before use. Thank you for your interest and consideration in purchasing. I would like to pass it on to someone who can use it, but please understand that it will be sold to the first person to complete the purchase. I am also selling other diving-related items. Please feel free to let me know if you have any questions. Please feel free to let me know if you have any questions.