CASIO Studycal AZ-265 with eco-battery, comes with a convenient case. - Brand: CASIO - Model: AZ-265 - Battery Type: Eco-battery - Function: Studycal - Language Setting: Japanese - Accessories: Case Thank you for viewing. This is a must-have for commercial studies, so please take advantage of this beautiful item at a low price! I've only used it for 3 years, so I think it's in good condition! It costs around 7000 yen if you buy it at the regular price!