ITEM NAME:12V ACID Lead Battery Capacity Indicator Charge Level LED Tester Blue Voltm O6O4 12V ACID Lead Battery Capacity Indicator Charge Level LED Tester Blue Voltm O6O4 Working current: 5-15mA(The lower the battery voltage and current smaller) Eight electricity Resolution: 10% 25% 40% 50% 60% 75% 90% 100% Voltmeter accuracy: 1% Working temperature: -10 ~ +65 Celsius Operating Humidity: 10 ~ 80% Dimensions: 48*29*21 mm Color: black Light color: blue Material: plastic NOTE: It will only display voltage if not measure lead-acid battery!! Only the above package content, other products are not included. Note: Light shooting 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..Light color: blue. Color: black. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing.