Applicable Batteries --- Digital battery monitor is suitable for 10-100V lithium batteries (12v 24v 36v 48v 60v 72v 96v), lead-acid batteries, lithium iron phosphate batteries, Ni MH batteries.Default 12 volt lead-acid battery. LCD Display --- The battery status meter is designed with a clear LCD color screen, which displays the battery capacity, voltage, Fahrenheit temperature value (switched by key). Protection --- The battery detector is equipped with a protective shell, a dust-proof surface and input connection reverse protection. Application --- This multimeter can be used as battery voltage meter, battery capacity tester and panel temperature gauge for car, marine, RV, boat, etc. Alarm --- If the small battery indicator is in low voltage condition, its red indicator will flash and the buzzer will sound an alarm.