Uxcell DC 0-100V 3-Wire Mini Red LED 3-Digit Volt Voltage Panel Meter Voltmeter Small in size and light in weight, quite easy and convenient to carry out. 0.28" visible LED display, easy to read even in dim light. Use in cars, boats, planes and testing devices for measuring voltage and current. A good tool to monitor battery and charging voltage status of auto, moto, car etc. Its decimal point will move automatically according to different measured voltage.