Protection Mechanism: Input Undervoltage Protection (UVP): 11-125V adjustable, factory default 11V Output Overvoltage Protection (OVP): 1-130V adjustable, factory default 130V Output Overcurrent Protection (OCP): 0.01-23A adjustable, factory default 23A Output Overpower Protection (OPP): 1-1500W adjustable, factory default 1500W Overtemperature Protection (OTP): 30-99 adjustable, factory default 60 Overtime Protection (OHP): 1 minute - 99 hours 59 minutes, factory default is off Overcapacity Protection (OCAP): 0.001-9999Ah, factory default is off Overenergy Protection (OPH): 0.001-4000KWh, factory default is off Precautions: 1. AC power cannot be input, let alone 220V mains power. 2. The maximum allowable input voltage is 140V, and no over-voltage input or reverse polarity connection is allowed. 3. The output cannot be guaranteed to completely prevent backflow. When connecting the battery, ensure that the output voltage of the power module is always higher than the battery voltage, or connect a diode in series with the positive terminal of the output to prevent unidirectional conduction. Prevent battery voltage from flowing back and burning the power supply. 4. When connecting the output terminal to the battery, be careful not to reverse the positive and negative poles. 5. The product is a step-down transformer; the maximum output voltage = input voltage * 0.95-1V. Color: Black Material: ABS Package Contents: 1 x CNC Step-down Transformer DC Module Only the above package content is included; other products are not. Note: Light reflection and different displays may cause the color of the item in the picture to differ slightly from the real thing. The allowed measurement error is +/- 1-3 cm.