Application: This module is suitable for applications where the input voltage is higher than the output voltage, such as battery-powered devices, power transformers, DIY adjustable power supplies, automotive power systems (e.g., 24V to 12V, 24V to 5V, 12V to 5V, 12V to 3.3V), and other DC-DC step-down applications. Name: LM2596ADJ DC-DC Step-Down Power Module with Digital Voltage Display Features: - Built-in digital voltmeter with self-calibration function - Microprocessor-controlled voltage measurement with accuracy of ±0.05V, range: 0–40V - Input voltage must be ≥4.5V to ensure voltmeter accuracy - Single-button toggle between input and output voltage measurement - LED indicator shows which voltage (input or output) is currently displayed - Settings are retained after power cycling - Input voltage range: 4.5V–40V - Output voltage range: 1.25V–37V (adjustable); input voltage must exceed output voltage by at least 1.5V - Maximum output current: 3A (recommended continuous use up to 2.0A; enhanced heat dissipation required for higher currents) - Maximum output power: 20W (15W recommended for sustained operation; enhanced heat dissipation advised above this level) - Typical conversion efficiency: 88% (efficiency varies depending on input/output voltage, current, and load conditions) - Reverse polarity protection included Color: Blue Material: ABS Package Contents: 1 x LM2596ADJ DC-DC Step-Down Power Module Note: Due to lighting conditions and screen variations, the actual product color may differ slightly from images. Measurement tolerance: ±1–3 cm.