Texas Instruments TI-Nspire CX II-T Calculator Suitable for university, engineering, mathematics, and science students. Features: ✔ High-definition color screen. ✔ Advanced graphing, geometric, and mathematical calculations. ✔ Excellent speed and performance. Attachments: * Calculator. * Manual / Mini-USB connection and charging cable. * Original manuals. * Without the box. Important Note The device is new and unused, but the battery needs to be replaced. Therefore, it currently works only when connected via cable. The battery model is available for sale in many online stores, and a picture of the battery is attached. Price is reasonably negotiable.