Please refrain from purchasing this item for general use. Please consider purchasing this as a retro item. This product is a retro medical device from the Showa era and appears to be different from the blood pressure monitors currently sold by TERUMO. It is a very retro item and is now difficult to obtain. Please understand that this is a junk item with unconfirmed operation, and only purchase if you agree. Both the box and the main unit have considerable dirt and age-related deterioration. The battery compartment is considerably deteriorated. Please understand that we do not accept returns or refunds.