DRO 10i for EDM1-axis DRO for general purpose applications: Innova 10i Further informationDRO 20i for EDM2-axis DRO for general purpose applications: Innova 20iFurther informationDRO 30i for EDMDRO for grinders and general purpose applications: Innova 30iFurther information Characteristic differences between models: 10i E 20i E 30i E Display type LEDs LEDs 5.7" color TFT screen Number of axes 1 2 2 and 3 that may be set by parameter