Features: Experience high precise voltages measurement with our 4Digit LED Voltmeter, capable of detecting wide ranges from DC0-100V, ensuring reliable and accurate readings for your electrical projects. This voltmeter features a compactly design with a clearly digital display, low power consumption, and reverse connection protections, making it efficient tool for various applications. Ideal for electronic engineers, DIY enthusiasts, electricians, and laboratory technicians who require precise voltage monitoring in their work. Perfect for use in power supply monitoring, equipment maintenance, laboratory testing, and DIY electronics projects, providing versatilitys across different scenario. With its easy installation and adjustable resistance, this voltmeter is design to seamlessly integrate into your setups, offering three wire connection option for added flexibility. Specifications: Component:PC+Metal Size:Approx.30x14mm/1.18x0.55inch Measuring Ranges: DC0.000v-100v Display Modes:0.36Inch Digital Tube Power Consumption of This Unit: ≤20ma Operating Voltage: 4-30v (Recommended Ranges 5v-12v) Refreshes Rate: 3Times/Second Test Accuracy: 0.3% (Maximums Error = Ranges X0.003) Mounting Apertures: 2.9mm Leads Length:20cm Leads Definition: Red Working Power Positive, Black - Common Negative, Blue - Test Power Positive 3Option Type; Package Includes: 1pc Voltage Tester Panel note: Please allow 1-10mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.