Features: Stable performance A4988 driver chip with low power consumption, remains cool during operation, offering improved stability compared to standard chips. Compatible with CNC V3.0 and GRBL 0.8c open-source firmware; works with UNO to convert G-code commands into step signals. Supports 4-axis control (X, Y, Z, and A axisX, Y, Z or configured as a full 4-axis setup); includes 2 endstops per axis (6 total). Uses removable Pololu A4988-compatible stepper drivers (supports A4988, DRV8825, and similar models). Jumper settings allow microstepping configuration (some drivers like DRV8825 support up to 1/32 microsteps). Stepper motors connect via 4-pin Molex connectors or can be soldered directly. Operates on 12-36V DC power (note: only certain drivers such as Pololu DRV8825 support up to 36V; verify driver voltage ratings before powering). Specifications: Item: 3D Printer Accessories Kit Includes: CNC Shield V3.0, UNOR3 Board, A4988 Drivers, Stepper Motors Power Input: DC 12-36V Note: Allow 1-2 cm variation due to manual measurement. Ensure you are comfortable with this before ordering. Product color may vary slightly due to monitor display differences. Package Includes: 1 x CNC Shield V3.0 1 x UNOR3 Board 4 x Motor Wires 4 x A4988 Driver Modules (Red) 4 x 17HS4401S Stepper Motors 1 x USB Cable