0.28 Inch Dc 12v Mini Lcd Digital Voltmeter Voltage Meter Panel Volt Tester Detector Monitor 2 Wire Red Green Blue Led

Ultra-low cost, high precision meets most application requirements. High precision Low starting voltage, minimum 4.5V for red, 4.7V for green, and 5.0V for blue. With reverse connection protection, no burning if connected reversely. Technical parameter: Measuring range: red DC4.50-30.0V, green DC4.70-30.0V, blue DC5.00-30.0V Power supply range: No need for additional power supply, directly use the measured voltage as the power supply, the range is the same as above The highest input is DC30.0V. Note: The input voltage higher than 30V may be permanently damaged! Allowable error: 1%; when greater than or equal to 10V, the error is 0.3V; when le than 10V, the error is 0.10 Input impedance:> 100K ohm Working current: red