Applicable Battery Type --- DROK digital battery monitor is suitable for 10-100V (12v 24v 36v 48v 60v ) lithium battery, lead-acid battery, lithium iron phosphate battery, Ni MH battery. Application --- Can be used as battery voltage meter and battery capacity tester for car, marine, RV, boat, etc. Temp Gauge in F. --- The temperature indicator can display in Fahrenheit. (Note: the temperature is not the air but the internal meter temperature.) The 1 You Want --- Easy to install and use. Allows you to program the percentage with a corresponding voltage. Default --- 48 volt lead acid battery.