TWINBIRD See-Through Clock Digit DC-501 This item has been stored at home for a long time. There is a company name sticker from the gift giver on the back (see photo 3). I have confirmed the operation with AAA batteries for a short time, and I have confirmed the alarm function. Batteries are not included. The main body has age-related stains. The instruction manual is creased. Please understand the above before purchasing.