Take a step back in time with this vintage RadioShack EC-375 calculator. This handheld device is perfect for those who love vintage electronics. It runs on batteries and has a regular key size, making it easy to use. The calculator is in great working condition and is a must-have for any vintage calculator collector. Its model number is RadioShack EC-375, and it is not a modified item. This calculator is a vintage piece and is perfect for those who love collecting vintage electronics.