Features: It is a basic multi-function instrument that can display various physical parameters such as voltage, current, power, capacity, energy and working time in real time. Overvoltage, undervoltage, overcurrent can be achieved through reserved relay interfaces. and the meter uses a 1.8 inch color LCD as the display, displays more comprehensive data, clear and easy to observe. This meter is ideal for applications that require output and current voltage monitoring, as well as applications such as charging and discharging batteries. Bi-directional current sensing makes it easier for the user who detects the load and discharges to detect bi-directional current without changing the direction rewiring. Power-off memory function, able to memorize the number of AH and WH before powering off after power off, which is convenient for observation and measurement. With the output off function keys, flexible to open or stop the output. With overvoltage, overcurrent protection. If necessary, you can turn off the LCD, reduce the power of the product. Functional representations:1. Measuring battery percentage and remaining battery count AH.2. Measurement of bidirectional DC current.3. Measurement of bidirectional DC power.4. Measurement of bidirectional cumulative DC electricity.5. High voltage alarm flicker function.6. Low voltage alarm flicker function.7. High current alarm flicker function.8. Low electricity alarm flickering function.9. The function of reaching full voltage (this voltage can be set by yourself) automatically fills the battery.10. Zero current can be cleaned.11. The accumulation energy can be cleaned.12. The backlight can be closed or opened.13. Store data when power off.14. Hall sensor insulation type measurement, more safe and reliable, easy to install.15. Using STN full view LCD screen, clear display.16.Super wide range of power supply: DC5 - 90V. Note: If you need an electronic manual, please sit . Specification:Input Voltage: 6V - 75V (Self-Powered Measurement)0 - 120V (External Power Supply Voltage Measurement Range)Current Test Range: 0 - 100A/ 0 - 200A/ 0 - 400AAnth Resolution: 0.1A/ 0.1A/ 0.2A Supply Voltage Range: DC5 - 90V Voltage Test Range: DC0 - 300V Voltage Range: 0.1V Capacitance Test Range: 0 - 999AH Power Test Range: 0 - 999KWew Power Test Range: 0 - 999KWHThe Measurement Accuracy: 1% Slotting Panel Installation Size: 76.0mm x 39.5mm/2.99 x 1.56inSensor Hole Diameter: Phi; 20mm/0.79in Working Current: When the Backlight is Open: 10MA. When the backlight is closed: 4MA. Quantity: 1 PcNote: No retail package Transition: 1cm=10mm=0.39 inch Please allow 0-1cm error due to manual measurement, please make sure you do not mind before bidding. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package Included: 1 x Coulometer Hall Effect