Applicable battery types - Suitable for 10-100V (12v, 24v, 36v, 48v, 60v) lithium batteries, lead-acid batteries, lithium iron phosphate batteries, -metal hydride batteries. Application: It can be used as a battery voltmeter and battery capacity tester for automobiles, ships, recreational vehicles, etc. The thermometer F - temperature indicator can display degrees Fahrenheit. (Note: The temperature is not the air but the temperature of the internal instrument.) Easy to install and use. You are allowed to program the percentage with the corresponding voltage. Temperature range: -19°C- 80°C, -2.2°F-179°F Buzzer volume: minimum value: 60db, maximum value: 80db name:Battery Meter Colour: Black Material: ABS Package Contents: 1 x Battery Meter 1 set x Wiring harness 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.