Used in electric oven, water heater, lamps, small motor, electric iron, etc. How to use: The input is connected to DC9-60V. The output cable is connected to the cable of the electric heater or to the motor devices. Then turn the knob to adjust the speed, voltage, temperature Package included: 1pc x Voltage Regulator Note: The load does not exceed the maximum power, otherwiseit will burn the module and electrical equipment; use a resistive load as far as possible; reduces the inductive and capacitive load power considerably. (it is best to leave more than half of them) Size: 85-58-38mm Delivery Quantity: 1 piece, Kind tips 1. Package content: only the above package content, excluding other products. 2. The size is measured manually, please allow 1-2 cm measurement error. 3. Due to different monitors and lighting effects, the actual color of the item may be slightly different from the color shown on the picture.