This Texas Instruments TI-15 Explorer Scientific Calculator is a great choice for anyone who needs to perform complex calculations, whether in a professional or academic setting. The calculator is handheld, making it easy to take with you wherever you go, and it can run on solar power or batteries, ensuring that you always have the power you need to get the job done. With its blue finish and tested performance, this calculator is a reliable and attractive choice for any user. These were used in a classroom setting and do show some wear from use. All have covers, there is a sticker/writing on back from school. All have been tested and work as they should.