15W DC - DC Buck-Boost Converter, a Boost Module with CVCC That can Convert from 5V to 3.3V, 9V, 12V, 24V, 30V, an Adjustable USB Power Module with an Enclosure.

Adjustable output voltage The adjustable USB boost power module can be used as a USB - input adjustable desktop power supply. The output voltage can be adjusted arbitrarily within the range of 0 - 2A (wide input 4 - 13V, wide output 0.5 - 30V, with short - circuit protection, and short - circuit won't cause burning).
Safe operation When used as a USB charging cable, the charging voltage and maximum charging current can be adjusted arbitrarily (any voltage, constant current, anti - backflow, and can meet the charging needs of most batteries).
Three input power modes Input 1: Standard type A USB male head. It can only input DC 5V. Input 2: Micro USB female head. It can only input DC 5V. Input 3: IN + and IN - welding pads. It can input DC 4.0V - 13.0V. When using the welding pads for input, be careful not to connect the positive and negative electrodes reversely, and do not connect AC power.
Multiple protection functions It has short - circuit, over - current, over - heat, over - power, over - voltage protection, and charging anti - backflow protection.
Wide range of applications It is widely used in general power supplies, battery chargers, LED - driven power supply, instrument voltage display, test counter, circuit testing, and power conversion. For more details, please read the user manual (not necessarily in Chinese).

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