HP 50g calculator - "The essential tool for your university studies" The calculator is perfect, but the case is quite damaged. See photos as part of description. LHP HP50G - Graphic calculator (LCD display, 5 default modes ^), black Great total memory of 2.5 MB: 512 KB RAM and 2 MB flash ROM Equation library and more than 2,300 integrated functions You can use up to 15 digits Number of lines on screen: 12 Appropriate thematic field: engineering, computer science, trigonometry, physics Batteries recently changed. IT WORKS PERFECTLY It is sent the day after receiving the confirmation of payment.