Detecting Voltage: DC2.4v – 30v. Dimensions: 22.5 × 10 × 7mm (length x width x height) Working Current: <30mA.Display: 0.28 inch. Package including :2pcs.Color: red yellow green (three colors optional) This voltmeter can be used to measure the voltage of 18650 batteries, cell phone lithium batteries, NiMH battery packs and other battery packs. It can be used for motorcycles, cars, etc., and it is convenient to access the lines of cars/battery cars/motorcycles.