Product selling points: 1. Use high-quality materials, . 2. Low voltage alarm, high voltage alarm, overcurrent alarm, low capacity alarm. 3. Full screen can display all data, more intuitive. 4. Hall induction non-destructive measurement, super simple wiring. 5. Simple and convenient to use Parameters: Current measurement range: 400A. Power supply voltage range: DC5-120V. Voltage measurement voltage: DC0-300V. Voltage resolution: 0.1V. Capacity measurement range: 0~999AH (Note: 0~2000AH can be reached when only percentage is displayed). Power measurement range: 0~999KW. Electric energy measurement range: 0~999KWH. Table measurement error: +-1% Refresh speed: 0.5S refreshes the displayed information once. Temperature measurement range: -50 C~125 C. Installation slot size: slot size: 76. 0mm x 40. 5mm (20mm in diameter of sensor threading hole) Working current: backlight on: 25MA. Backlight off: 9MA (total power 0.3W, different voltage and current) Function introduction: 1.Measure the remaining battery power percentage % and the remaining power AH number. 2.Measure the positive and negative bidirectional current of DC. Measure the DC voltage. 3.Measure the positive and negative power of DC. 4.Measure the accumulated electric energy in both positive and negative directions of DC. Overvoltage alarm function, the alarm voltage size parameters can be set by yourself. (There is an alarm sound, and there is an alarm output control CN2) Low voltage alarm function, the alarm voltage size parameters can be set by yourself. (There is an alarm sound, and there is an alarm output control CN2) Overcurrent alarm function, the alarm current size parameters can be set by yourself. (There is an alarm sound, and there is an alarm output control CN2) Battery remaining low power alarm function, the power flash continuously, prompting the user to charge. (There is an alarm sound, and there is an alarm output control CN2) Battery over-temperature alarm function, the alarm temperature can be set by yourself. (There is an alarm sound, and there is an alarm output control CN1, which can be used to control the battery cooling fan. Note: All control output signals are weak signals of 10MA, and device requires the customer to amplify it with an external amplifier circuit for control.) Power-off data storage function. The Hall sensor isolation measurement is safe and reliable, and the wiring installation is very simple and convenient. Note: Do not interchange the sensors! ! ! Color: Black & White Material: Metal + Plastic Package Contents: 1 set of 400A Hall Coulomb meter with Bluetooth 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.