DROK Adjustable Voltage Regulator, DC Buck Boost Converter 6-30V to 0.5-30V 4A 60W 5V 24V Voltage Converter, 12V Power Supply Step Up Step Down Transformer with USB Port Case LCD Display Volt Amp

Parameter --- Input voltage: DC 6-30V; Output voltage: DC 0.5-30V; Output current: 4A (max), adjustable, recommended to use within 3A; Output power: 60W (max), recommended to use within 50W.
Easy to Read LCD Display --- The buck 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.
Application --- This voltage step up and down module can be used as a normal boost buck converter module with over-current protection, a battery charger, a high-power LED constant current driver module, etc.
Features --- Constant current/voltage mode; Voltage calibration calibration; USB output; 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.