Drok Voltage Boost Converter 2Pcs, 12V To 24V Dc Step Up Converter, Adjustable Product Details DROK DC 5V to 12V Voltage Boost Converter Module Parameter --- Input voltage: DC 6-30V; Output voltage: DC 7-32V continuously adjustable (the output voltage must be at least 1.5V higher than the input voltage); Output current: 5A (max), adjustable, recommended to use within 4A; Output power: 60W (max), recommended to use within 50W. Clear LCD Display --- The boost board is designed with a large clear digital LCD display on which shows both voltage and current value simultaneously. Which is easy to read and can help the user easily monitor the output voltage, then largely enjoy their DIY work. General Application --- This voltage step up converter can be used as ordinary step-up module with over-current protection, constant current LED driver module; DIY a solar power controller, etc. Features --- Constant current/voltage mode; Voltage calibration calibration; Protective case; Short-circuit protection; Over-temperature protection; Input reverse connection protection. You can find the PDF Instructions on this page -- Product information -- Product guides and documents -- User Manual [PDF]. NOTE --- 1). Constant current adjustable means that CC mode only works when the actual load output current is greater than the setting one, otherwise it will work in a constant voltage state, not the current is adjusted to 2A, then it will become 2A for any load being connected. And if the CC value to be adjusted is small, adjust ?ADJ-I? counterclockwise a few more times to change. 2). The case is packaged disassembly to avoid damage during transit. It needs to be manually installed. Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.