DC4-100V LED Display Circular Two-wire Automotive Voltmeter Digital Car Voltage Current Meter Volt Detector Tester Monitor Panel Easy to Install Reverse Polarity Protection Features 1. Ultra-thin mirror 2. Round hole 3. Easy to install 4. Reverse polarity protection 5. Reverse connection does not burn Product parameters Measuring range: 4V-100V Power supply range: 4V-100V Minimum startup: 3.8V Allowable error: ±1% Input impedance: >100K ohms Operating current: red <15mA, green <12mA, blue <12mA Refresh rate: about 300mS/time Display mode: three-digit circular LED digital tube Display colour: red, green, blue optional Lead length: 20cm Dimensions: Diameter 33.8 Hole size: diameter 30.0 Working temperature: -10℃～65℃ Note: Input voltages higher than 100V may be permanently damaged
