ITEM NAME:DC 3.5-30V Mini 5 Digit Digital Blue LED Voltmeter Volt Meter Panel Car Description: High accuracy: measuring range of 0-33.000V Reverse protection, then do not burn the voltmeter Can be used for measuring the car / battery car / motorcycle battery voltage, and other forms of voltage Can be used in all kinds of voltage measurement purpose Working Voltage: 3.50-30.0V Specification: Material: Plastic Measurement accuracy:  ±(0.3†°+2 digit) Display: 0.36 "5 digital tube. Refresh rate: about 2times/s Display color: Blue Operation temperature:-10 degrees~65 degrees 5 digit, three 14cm wire Update rate: About 1s/time Temperature coefficient: ï ¼Å“25PPM/℃ Size: Approx. 48x 29x 22mm/ 1.89x 1.14x 0.87inch Package Includes: 1 Piece Mini Digital Voltmeter Note: Flexible Power supply : You can use the isolated power supply, you can also do not need to isolate the power supply, with the system power supply ground..5 digit, three 14cm wire. Display color: Blue. Size: Approx. Temperature coefficient: ï ¼Å“25PPM/℃.