AC. Battery voltage should not exceed the calibration ranges. This product is splash-proof, but cannot be immersed in water. Setting display and corresponding battery specifications: 12 V L: 12 V lithium iron phosphate battery 24V L: 24V lithium iron phosphate battery 36V L: 36V lithium iron phosphate battery 48V L: 48V lithium iron phosphate battery 60V L: 60V lithium iron phosphate battery 72V L: 72V lithium iron phosphate battery 12 V S: 12 V ternary lithium polymer battery 24V S: 24V ternary lithium polymer battery 36V S: 36V ternary lithium polymer battery 48V S: 48V ternary lithium polymer battery 60V S: 60V ternary lithium polymer battery 72V S: 72V ternary lithium polymer battery Specifications: Name: Battery SOC Meter Material: plastics Color: green, blue, orange (optional) Voltage measurement ranges: DC8-100V Display format: ＜10V display format such as:9.99V ＜100V display format such as:99.9V 100V display format such as: OL Accuracy:1% Percentage Ranges：0%-100% Display format: ＜10%display format such as:9% ＜100%display format such as:99% 100%display format such as:100% Battery symbols: Graphical: Five-bar symbols, each representing 20% Display format: Electric quantity ＞90% display full bars 80%＜electric quantity 90% the first cell is flicker electric quantity 80% display four bars 60%＜electric quantity 70% the second cell is flicker Hole-cutting size: 56.5 * 28.5mm / 2.22 * 1.12in Item size: 61.8 * 33.6 * 16mm / 2.43 * 1.32 * 0.63in Package size: 100 * 80 * 50mm / 3.94 * 3.15 * 1.97in Package weight: 150g / 5.29ounce Packing List: 1 * Battery SOC Meter