Measure the remaining battery capacity percentage (using the battery grid) and the remaining capacity AH number.Measure the magnitude of DC positive and negative bidirectional current.Measure the .Measuring DC positive and negative power size.Measure the positive and negative DC positive and negative cumulative energy size.Over-voltage alarm flashing function, the alarm voltage size parameters can be set.Low voltage alarm flashing function, the alarm voltage size parameters can be set.Overcurrent alarm flashing function, the alarm current size parameters can be set.The remaining battery low alarm flashing, the battery will continue to flash, prompting the user to charge.Charging, battery water light rolling tips.Full voltage automatically fill the battery capacity function.Clear current function.Clear the accumulated power function.Backlight can be manually turned off or on.Power-down data save function, power-off when the battery power, accumulated power, etc. are automatically saved when power-down. sensor isolation measurement, safe, reliable, easy to install. full-viewing angle LCD screen, 360 degrees without dead ends. With backlight, no matter night, daytime, interior, room Outside, direct sunlight are clearly visible.Wide supply voltage range: DC5 ~ 90VCurrent resolution 0.1A 0.1A 0.1A 0.2ASupply voltage range DC5 ~ 90VVoltage measurement range DC0 ~ 300VVoltage resolution 0.1VCapacity measurement range 0 ~ 999AHPower measurement range 0 ~ 999KWEnergy measurement range of 0 ~ 999KWHTable measurement error + -1%Refresh rate of 0.5S refresh time to display informationInstallation slot size 76.0mm x 39.5mmSensor threading hole diameter 20mmOperating current when the backlight is lit: 10MA. When the backlight is off: 4MA.Colour:BlackMaterial:plastictype:C: 50A With BluetoothPackage Contents:1 x Hall Coulomb MeterOnly 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.