140KHz Operating Frequency Bu-ck Power Module DC-DC Converter Regulator Q81COOTDTYes: This step-down voltage module with a wide input voltage range from 9V to 40V, the step-down converter can accurately adjust the output voltage and current. Input and output use high frequency low resistance electrolytic capacitor, low ripple, stable output. Short circuit protection, over-temperature protection, over-current protection. It is safer to use. This DC power module is a non-isolated DC regulated power converter module with a long service life. Suitable for derating voltage appications, such as battery, power transformers, adjustable voltage regulator, portable power instrument. This bu-ck voltage converter module is used for step-down voltage so make sure the input voltage is higher than the output voltage. Specification: Material: ABS Size: 40x30x1 9mm/1.6x1.2x0.7in Type: A/B/C (Optional)Input Voltage: 9-120V Frequency Ratio: 140KHzHigh Efficiency: 95%Package Included: 1X Voltage RegulatorNote: Please allow 1-3cm error due to manual measurement. Pls make sure you don't mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.