Description: Voltmeter ammeter voltage range is DC 0-100V, current range is 0.0-10A. The multimeter can clearly display voltage and current at the same time, red for voltage, blue for current. Can be installed on anywhere flexibly. The voltage ampere monitor gauge is powered by the circuit being measured, no need to connect extra power source. This volts amp tester is designed with built-in trimmer potentiometer, enable you to calibrate the meter easily. Specification: Material: Plastic + PCB Color: Black LED Display Color: Red & Blue Size: Approx. 48x29x22mm/1.89x1.14x0.87 inch Mounting holes: Approx. 46x27 mm/1.81x1.06 inch Lead length: Approx. 15cm/5.91 inch Operating Temperature: -10 ℃ ~ 65 ℃ Voltage Measurement Range: 0.0V-100V Current Testing Range: 0-10 A Power Supply Range: DC 4-30.0 V Voltage Error Range: ± 0.1% Current Error Range: ± 1% Working Current: < 20mA Refresh Rate: about 300mS time Display: double 3 pcs about 0.28 inches LED digital tubes Package Includes: 1 Piece Digital Voltmeter Ammeter