4Pcs DC-DC Buck Boost Converter Module 5.5-30V to 0.5-30V 4A 35W Adjustable Step Up Down Voltage Regulator LCD Digital Voltmeter Ammeter Adjustable Boost Drop Display Power Supply Module

Buck-boost converter input voltage range is DC 5.5 -30V; output voltage range is DC 0.5 -30V, arbitrarily adjustable; output current range is 0-4A, arbitrarily adjustable, and can reach 4A with enhanced heat dissipation; max output power is 35W, with 3A 35W for long-time stable operation, and can reach 50W with enhanced dissipation.
Button control: Short press IN/OUT to switch input and output voltage, long press to switch output current power. Short press ON/OFF to control output ON or OFF, long press to set the default output state ON or OFF. The voltage regulator module adopts an LCD design and can switch display between input voltage, output voltage, output current, and output power; voltage display resolution is 0.05V, current display resolution is 0.005A. The liquid crystal can display the input and output voltage and the output current output power, and can be used for common boost and buck modules with over current protection, adjustable battery chargers, and LED drivers.
Safety protection: LC filter, small output ripple, input anti-reverse connection protection, will not burn down, short-circuit protection, low-voltage protection