ITEM NAME:DC 5V-12V 2-phase 4-wire Micro Mini Stepper Motor Driver Speed Controller Modu-Q Specifications: Voltage range: DC5V-12V Rated current: ≤ 800mA Power reverse connection protection: yes Overcurrent protection: yes Overheat protection: yes.Power reverse connection protection: yes. Overheat protection: yes. Overcurrent protection: yes.