12V to 5V 3.3V 3.7V 4.2V 6V 7.5V 9V 15W dc dc converter power supply Product Description 1. Input voltage: 8-20V 2. Output voltage: 1V-9V adjustable minimum pressure 2V, step-down power supply input voltage must be higher than the output voltage of 2V or more, in order to have output 3. Working temperature: -40 to +85 degrees 4. Operating Frequency: 300KHz 5. Conversion efficiency: up to 92% (efficiency with input and output voltage, current, pressure related) 6. The overcurrent protection function: over-current protection; over-temperature protection Notes: Please connect the polarity correctly, or the converter will be burnt. This DC/DC Converter can't work as solar controller or wind controller. Other Policies 1. We are not responsible for any custom duty or import tax. 2. All emails will be answered within 24 hours. If you don' t receive our reply, please kindly re-sent your email and we will reply to you asap. Packaging and Shipping 1.Product will be shipped within 1-2 business day after full payment is received and verified. 2. The transportation time is uncontrollable. Please wait patiently and continue to pay attention to the package dynamics. If you have any questions, please contact me immediately. Delivery Tips When you place an order, please choose a shipping method and pay for the order including the shipping fee (freight does not include any customs duties and other customs charges). Please fill out the complete consignee name, address, telephone number, zip code,tax number. When the goods import into your country, at the time of delivery may produce some import tariffs and other customs fees because of the different national regulations, So the buyer will be responsible for tariffs and other customs fees. However, in our experience, this cost are rarely occur in small batch orders like us Feedback 1.We rely on our reputation and customer satisfaction to succeed. Therefore,your feedback is extremely important to us. Please leave good feedback to us if you are satisfied with our goods and service. 2. If you are unsatisfied with any aspect of our service,please send me a message us before leaving any negative feedback or opening anydispute on the site. We will help you solve the problem.