It Can Accurately And Real-Time Detect The Battery Pack's Voltage, Current, Power, Real Capacity, Remaining Service Time And Other Parameters. The Use Of High-Precision Clock Crystal Oscillator To The Accuracy Of Time, Electricity Statistics Are Guaranteed. Two-Way Automatic Detection, Accurate Measurement, Intelligent Control, Accurate Understanding Of The Working State Of The Battery At Any Time. With Backlight Display, Low Power Reminder, Output Overcurrent Alarm And Other Functions, Stable Performance. Suitable For The Operating Voltage In DC6V-60V, The Operating Current Within 30A Lithium Battery, Lithium Iron Phosphate, Nickel Metal Hydride And Other Battery Packs. Battery terminal or charging terminal voltage range: 6-60VDC. The temperature rise of the board will be larger if it is higher than 50V, and the measurement will be inaccurate if it is lower than 6V. Maximum allowed current: 30A. Above 25A, the temperature rise of the board will be relatively . Voltage display accuracy: resolution 0.02V, accuracy ±0.06V. The voltage shows the voltage across the battery. Current display accuracy: resolution 0.02A, accuracy ±0.05A. The current display is the discharge or charging current of the battery main line. Product size: about 78.8 x 42.8 x 26.3mm Tips: The product uses the Hall principle to detect current. It is recommended to stay at least 15 centimeters from magnetic objects when using it, otherwise the current accuracy will be affected. Note: Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use Colour:As Shown Material:ABS Package Contents: 1 x 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm. Coulomb Meter Battery Indicator Battery Meter