This fuel gauge is suitable for 6V, 12V, 24V, 36V, 48V, 60V, 72V, 84V, 96V battery (common for batteries 96V), and can also measure lithium batteries, polymer batteries, and -metal hydride batteries. It can also be used for other power/voltage measurement purposes. Double display battery + voltage at a . The display is more intuitive. The upper 8 show the battery power (2 red and 6 green). Downlink voltmeter (display battery voltage), voltmeter decimal automatic shift accuracy is higher. It has a wide range of applications, including lithium battery packs, lead-acid batteries, car batteries, electric car batteries, and many other types of batteries and electric equipment. The calculation of the existing voltage is the same as that of the power display meter of an electric vehicle. The meter head automatically recognizes the voltage and electricity, and has a reverse connection protection function (reverse connection will not burn). Instructions for use: The two-wire system of the meter head can directly test the battery. Parameter: Voltage tolerance: 1% 8 levels of power: 10% 25% 40% 50% 60% 75% 90% 100%full Working current: 5-15 ma Refresh speed: 300mS once Display mode: three-digit 0.56inch LED digital tube Voltage color: red, blue Lead length: about 20cm Dimensions: 48 x 29 x 22 mm, length X width X thickness Mounting hole: 46 x 27 mm Working temperature: -20~65 DIY Supplies: ELECTRICAL Display Type: Digital Only Power Supply: DC color:As shown Material:plastic Package Contents: 10 x Car Battery Charge Level Indicator (red digital display 72V) Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.