Here's an overview and some details about the dual color Red or Blue LED:

Dual-Color LED Display: The display module features dual-color LEDs, which means the digits can be displayed in either red or blue, depending on the configuration. This color change might be used for visual distinction or to indicate certain conditions.

0.28-inch Display: The display size is 0.28 inches, referring to the height of the numeric digits. This is a common size for compact digital displays used in various applications.

Voltage Measurement: The module is capable of measuring DC voltage within the range of 0-100 volts. This is useful for monitoring the voltage level of a power source, battery, or any other DC voltage-producing component.

Current Measurement: The module can also measure DC current within the range of 0-100 amperes. This involves the use of a shunt resistor, which is a low-resistance component placed in series with the current path to measure the voltage drop across it, which is proportional to the current flowing through it.

Shunt Resistor: A shunt resistor is a precision resistor with a known resistance value. By measuring the voltage drop across the shunt resistor, the current passing through it can be calculated using Ohm's law (I = V / R, where I is current, V is voltage, and R is resistance).

Digital Meter: The module is designed to display the voltage and current values digitally, making it easy to read and monitor.

Accuracy: The accuracy of the measurements depends on the quality of the components and the precision of the shunt resistor. High-quality components are essential for accurate measurements.