Currently, we are unable to confirm operation due to battery depletion or other reasons. We have not performed checks such as battery replacement, so please understand that it is being sold as-is with unknown functionality. Wrist circumference is approximately 14cm. We cannot guarantee any operation or condition for matters not described. Please check the condition in the images. No refunds or returns after purchase. As this is a used item, please refrain from purchasing if you are looking for perfection or are sensitive about condition. Thank you for looking! ♪