This is a Koala's March clock that I won in a Lotte lottery. The clock uses one AA battery. Operation has been confirmed. Batteries are not included. The size is approximately 23cm high x 17cm wide x 10cm deep. There is no box or instruction manual. It has been stored at home for many years, so please purchase only if you understand this. Also, please be aware of initial scratches and age-related deterioration.