It is a DC 3.5~30V/0~200V White/Red/Green/Blue/Yellow Led Digital Voltmeter/2in1 Panel Meter/Tester, Power Supply DC 4.5~30V, Application: industrial equipments,electronic equipment, Power distribution box, distribution cabinet, regulators, teaching aids, household small distribution box, Storage Battery Car,Motorcycle, Car, E-bike, ATV, Scooter, and All kinds Voltage Measuring.