This product is a high-precision current collection type battery meter (also known as a coulomb meter), which can accurately detect real-time parameters such as voltage, current, power, true capacity, and remaining usage time of the battery pack, and keep track of the battery's working status at any time. Support custom low capacity alarm values Support zero capacity/full capacity voltage setting Support brightness adjustment function (automatic/manual) Support shutdown voltage setting Voltage applicable range: 6-60V Display screen: 280 x 240 pixels high color gamut Current applicable range: CS30-30A Maximum current resolution: 1mA (0.001A) Display content: current, voltage, SOC (percentage), capacity, power, remaining time, sampling temperature, charging and discharging status. Working power consumption: 200-300mW Sleep power consumption: 5.0-50mW Colour:black Material:plastic Package Contents: 1 * Battery Tester 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. Have a great time shopping!