I purchased this in 2022 and primarily used it for marathon training, but I've switched to another brand, so I no longer have a use for it. It's been used for almost three years, and the battery life has deteriorated, but it still lasts for nearly a week on a full charge. I bought it for 27,300 yen at the time. It hasn't been charged, so please charge it upon arrival. I will delete the data and ship it. Immediate purchase is available.