Working voltage: 10-100V Power consumption: 8-10mA (backlight bright) Temperature measurement range: -17.84-81.74 °C Size details: Product size: 61.5x33.5x13.5mm Installation size: 58.5x28.5mm Display size: 33x16.5mm Material:plastic colour:black Package Contents: 10 x Battery capacity monitor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Default value --- 12 volt lead-acid battery. Applicable battery type --- digital battery display is suitable for 10-100V (12v 24v 36v 48v 60v) lithium batteries, lead-acid batteries, lithium iron phosphate batteries, nickel-metal hydride batteries. What you want-easy to install and use. Allows you to program the percentage with the corresponding voltage. Application --- It can be used as a battery voltmeter, battery capacity tester and temperature indicator panel, suitable for automobiles, ships, RVs, ships, etc. The thermometer shows the temperature in Fahrenheit. - - The temperature indicator can be displayed in Fahrenheit.