The Texas Instruments TI-30Xa Scientific Calculator is a reliable handheld device that is powered by batteries. With a regular key size and designed specifically for scientific calculations, this model is ideal for various tasks in the office or educational settings. The TI-30XA calculator is known for its accuracy and ease of use, making it a valuable tool for professionals and students alike. With a new battery included, this calculator is ready to go and provide efficient calculations whenever needed.