Specifications: ●Material: Thickened Circuit Boards + High-Q Inductance ●Size: 43 X 21 X 14mm ●Weight: 10g ●Color: Blue + Silver ●Package Included: LM2596 Buck Converter Module X 7Pcs Please Note: 1. Input voltage must be 1.5 V higher than the output voltage, can't boost. 2. Do not reverse the input and output interface. 3. Keep output under 2.5A and use a heat sink when for a long time working. Model: LM2596 Input Voltage: DC 3.2V-40V. Output Voltage: DC 1.25V-35V (Adjustable) Output Current: 3A (Max). Conversion Efficiency: 92% (Max). Switching Frequency: 65KHz. Output Ripple: 30mV (Max). Load Regulation: ± 0.5%. Voltage Regulation: ± 2.5%. Operating Temperature: -45℃～+85℃. 100% Satisfaction Guarantee: ●If the goods are defective or have other problems, please feel free to contact us by email. ●We will respond quickly to your questions. ●We will do our best to meet your needs. ●We can give you 100% money back if you are not satisfied with our products. ●We strive to offer you only the highest quality products and the best service, your satisfaction is our highest priority !!!