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. ① Support custom low capacity alarm values ② Support zero capacity/full capacity voltage setting ③ Support brightness adjustment function (automatic/manual) ④ 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.