It is a Digital Meter/Multimeter/3in1 Panel Meter/Tester, Power Supply Voltage: DC7~30V ( with anti-reverse protection ), Measuring temperature Range: -55 to 125°c, Measuring Voltage Range: 0~33VDC, Clock: 24-hour, 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, Water, Refrigerator, Aquarium ,home,factory,garden,And other platforms.