XINGYHENG 2Pcs DC-DC Buck Voltage Converter Power Module Step-Down 4.5-40V 12V to 5V/2A + Power Supply Stabilizer Voltage Regulator with LED Voltmeter 5V USB Charger for Enhanced SEO Review

Super material: It is made of electronic accessories, nickel plating on surface(anti-oxidatioan), inner conductor: pure copper.it is long lasting and durable for you to use. Package including: 2 Pack of Constant Current Boost Step-up Module. Integrated voltmeter, buck voltage converter and 5V USB charger port, multifunctional and practical. Input and output: Wide voltage measuring /input range: DC 4.5-40V; with self calibration, high accuracy. One button ("output enable" button) switch for USB output, one button ("low power" button) enters ultra low power consumption mode. Feature: Voltmeter, step-down voltage converter and 5V USB charger port, versatile and practical. With LED indicator for USB power supply and terminal block, easy to operate. A wide range of applications: This module can be applied to the buck field where the input voltage is higher than the output voltage, such as battery, power transformer, DIY adjustable power supply, and so on. Maintain stable output voltage and limit the output current over a range of input voltages. Great for general voltage conversion, Car / motorcycle battery voltage monitor or other voltage measurements, and electronic projects.