SPECIFICATIONS Brand Name: ZHONG HUA JIANG Origin: Mainland China Certification: CCC Certification: ce Step Angle(degrees): CNC Engraving Milling Machine Model Number: Ardiuno CNC kit Holding Torque: CNC Stepper Motor Current / Phase: Stepper Motor Type: HYBRID Certification: CE KitApplication: for CNC/ 3D printer Stepper Motor: for 3D printer 3D Printing Accessories: CNC Accessories Package Lists: 1 x CNC Shield V3 1 x UNO R3 MEGA328P CH340G with USB Cable 5 x DRV8825 Stepper Motor Driver with Heat Sink 5 x RAMPS 1.4 Mechanical Switch Endstop 5 x 3pin Cable (70cm) 3 x Nema 17 Stepper Motor 3 x Nema 17 Mounting Bracket CNC Shield Board: Latest CNC Shield Version 3.0 for Arduino GRBL 0.9 compatible 4-Axis support (X, Y, Z, A-Can duplicate X, Y, Z or do a full 4th axis with custom firmware using pins D12 and D13) 2 x End stops for each axis Coolant enable Compatible with A4988 or DRV8825 stepper driver Working Voltage: 12-36V DC Max. Working Current: 2.5A RAMPS 1.4 Mechanical Switch Endstop: Red: VCC (ramps +) Black: GND (ramps -) Green: SIGNAL (ramps s) DRV8825 Stepper Motor Driver: Size: 1.5mm x 2mm Upgraded from A4988 Maximum Current: 2.5A 32 Subdivision: 1, 1/2, 1/4, 1/8, 1/16, 1/32 4-layer PCB board for better heat dissipation Suitable for driving stepper motors up to 8.2V~45V, 2.5A Nema 17 Stepper Motor: Model: 17HD48002H-22B Rated Current/phase: 1.7A Step Angle: 1.8 deg. Holding Torque: 59Ncm(84 oz.in) 0.5NM kgf Frame Size: 41 x 41mm Body Length: 47mm Shaft Diameter: 5mm Shaft Length: 22mm Latest CH340G CNC Shield expansion board Version 3.0 for Arduino, and compatible for GRBL 0.9. UNO R3 Board, MCU: ATmega328, USB interface: ATmega16U2 with 1.5m USB cable. 5pcs RAMPS 1.4 Mechanical Switch Endstop for 3D printer RAMPS 1.4 with 3pin 70cm cable. 5pcs DRV8825 Stepper Motor Driver with heat sink, upgraded from A4988, max. current: 2.5A, 32 subdivision: 1, 1/2, 1/4, 1/8, 1/16, 1/32. 3pcs Nema 17 Stepper Motor 59 Ncm (84 oz.in) 47mm Body 1.8 degree with mounting bracket kit. Features: This is a professional sensor kit for UNO R3. New and upgraded, we provides various components or sensor module, with which you will find it easy for you to complete every experiments or learning. All these are packaged in a portable case, easy to carry and storage.