Are you looking for a professional, yet voltmeter? Are you in search of a sturdy, trustworthy tool that can do multiple works at once? , ! Our professional voltmeter must meet your needs. It is one of the for you. Features - ColorAssorted Color - Size: 4.80X2.90X2.20cm/1.89X1.14X0.86 inch. - Material: Plastic. - Dual color display, this digital voltmeter is clear and convenient to read. - Application: Monitoring storage battery, solar panel, model railroad, RV, motorcycle, house batteries, motor, etc. - It adopts a 0.28 inch 3-digit LCD large screen display, which can directly view the current and voltage. - Reverse connection protection: There is reverse connect protection for working power, but long-term reverse connection may also cause damage. - Special design: Volts amp tester is designed with a built-in trimmer potentiometer, enabling you to calibrate the meter easily. Specification - Voltage measuring range: 0- . - Current measuring range: 0-10A. - Working voltage: DC 4-30V. - Voltage error: ±0.1%. - Current error: ±1%. - Refresh rate: About /time. - Working current: <20mAh. - Operation temperature: -10 degree centigrade-65 degree centigrade. - Display color: Red and green. Package list: 5 x digital voltmeters