Solar powered, no charging required. There are minor scratches on the back. Body only, no manual. ◾️ Although there are no noticeable stains, please consider purchasing after understanding that it has been stored by a non-professional. Please be aware that it is not a complete or beautiful item. ◾️ It has been stored in a dark place, inside a plastic case to prevent dust. ◾️ I am a non-smoker and do not have any pets. ◾️ It will be packaged with water protection and cushioning material before shipping. 【Brand and Model】 This calculator is the F-789SG model by the trusted brand Canon. It is designed specifically for scientific calculations, making it ideal for students and professionals. 【Design and Functionality】 The silver exterior is stylish and features an easy-to-use key layout. It has various calculation functions, making complex calculations easy. 【Durability】 The back is gray and features a sturdy construction. It is designed to withstand long-term use. - Brand: Canon - Model: F-789SG - Color: Silver - Back Color: Gray - Function: For scientific calculations - Key Layout: Standard calculator key layout