Here are the key features and components of an XL4015 5A Step Down Adjustable Power Supply with LED Voltmeter:

Adjustable Output Voltage: The XL4015 module allows you to adjust the output voltage within a specified range. This adjustable feature makes it versatile for various applications.

High Current Handling: It can handle relatively high output currents, typically up to 5A. This makes it suitable for powering a wide range of electronic devices and circuits.

Efficiency: Buck converters like the XL4015 are known for their high efficiency in voltage conversion. They can efficiently step down the input voltage while minimizing power dissipation as heat.

LED Voltmeter: The module often includes an integrated LED voltmeter that displays the output voltage. This voltmeter makes it easy to monitor the output voltage without the need for additional equipment.

Input and Output Terminals: The module typically has input and output terminals for connecting the input voltage source (e.g., power supply or battery) and the load (e.g., your electronic circuit).

Adjustment Potentiometer: There is usually an onboard potentiometer or trimmer that allows you to adjust the output voltage to your desired level.

Protection Features: Some XL4015 modules come with protection features such as over-current protection and over-temperature protection to safeguard the module and connected devices.