ITEM NAME:DC 3.5-30V Mini 5 Digit Digital LED Voltmeter Volt Meter Panel Car 2 Packs 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: 3.5-30V. Specification: Material: Plastic Measurement accuracy:  ±(0.3†°+2 digit) Display: 0.36 inch 5 digital tube Refresh rate: about 2times/s Display color: Red, Green 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: 2 Pieces Mini Digital Voltmeters 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. Size: Approx. Display color: Red, Green. Temperature coefficient: ï ¼Å“25PPM/℃.