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 DC positive and negative power size. Measure the positive and negative DC cumulative energy size. Over-voltage alarm flashing function; the alarm voltage parameters can be set. Low voltage alarm flashing function; the alarm voltage parameters can be set. Overcurrent alarm flashing function; the alarm current parameters can be set. 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 data such as battery power and accumulated power are automatically saved. Sensor isolation measurement, safe, reliable, easy to install. Full viewing angle LCD screen, 360 degrees without dead zones. With backlight, clearly visible whether night or day, indoors or outdoors, under direct sunlight. Wide supply voltage range: DC5 ~ 90V. Current resolution: 0.1A. Supply voltage range: DC5 ~ 90V. Voltage measurement range: DC0 ~ 300V. Voltage resolution: 0.1V. Capacity measurement range: 0 ~ 999AH. Power measurement range: 0 ~ 999KW. Energy measurement range: 0 ~ 999KWH. Measurement error: ±1%. Refresh rate: 0.5S. Installation slot size: 76.0mm x 39.5mm. Sensor threading hole diameter: 20mm. Operating current with backlight: 10mA. Operating current without backlight: 4mA. Color: Black. Material: Plastic. Model: C: 50A With Bluetooth. Package Contents: 1 x Hall Coulomb Meter. Only 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 to appear slightly different from the real thing. The measurement allowed error is +/- 1-3cm.