XL6009 4A DC-DC Adjustable Step-up Power Module With LED Voltmeter

From the shop's description

XL6009 4A DC-DC Adjustable Step-up Power Module With LED Voltmeter The DSN6009 is a high-performance boost (BOOST) module with 4A switching current. Wide input voltage 3V ~ 32V, the best operating voltage range is 5 ~ 32V Wide output voltage 5V ~ 35V Built-in 4A high-efficiency MOSFET switch, the efficiency of up to 94%; (LM2577 current is only 3A) High switching frequency of 400KHz, You can achieve very good results with a small capacity of the filter capacitor (LM2577 frequency is only 50KHz)