Specifications:

Measurement range: 0-40V DC
Display size: 0.56 inch LED display
Number of wires: 3 wires (simple connection)
Readings: Three-digit display with clear numerical readings
Measurement accuracy: ±1% (ensures reliable and accurate voltage reading)
Operating temperature: -10°C to +60°C
Display colors: Depends on the model (usually red, blue, or green)
Functions:

Measurement of DC voltage: The device measures DC voltage from 0 to 40V, making it versatile and suitable for various electrical circuits.
Bright LED display: The 0.56-inch LED display provides clear visibility even in poor lighting conditions.
Simple connection: The three-wire system allows easy integration of the device into an electrical circuit, suitable for both amateurs and professionals.
Usage:

In automotive electrical systems: Used to monitor battery voltage, ensuring the stability of the electrical system.
In industrial and laboratory projects: Can be used as a simple voltmeter for various low-voltage devices.
Battery monitoring: Used to check voltage levels in batteries and other DC power sources.
Pros:

Easy to use and install: The three-wire system ensures straightforward integration into various electrical circuits.
Compact and lightweight: The small-sized device can be easily mounted in any electrical system or device enclosure.
Bright LED display: The 0.56-inch screen with clear digits is highly visible even under low-light conditions.
Versatility: Suitable for many projects and DC systems, ensuring wide applicability.
Cons:

Only measures DC voltage: The device measures only direct current, so it cannot be used in alternating current (AC) networks.
Limited voltage range: Operates only up to 40V, making it unsuitable for measuring higher voltages.
No additional features: The device only measures voltage, requiring additional devices if current or other parameters need to be monitored.
This digital voltmeter is a convenient and versatile device designed for use in various projects. It is easy to use, compact, features a bright LED display, and offers simple installation, making it ideal for monitoring DC voltage.