The electronic ruler adopts ultra-low power consumption microprocessor to achieve ultra-long standby and battery life.features such as straight line measurement, round measurement, arbitrary curve measurement, irregular surface measurement, cylindrical diameter measurement, accumulationsubtraction of 10 historical records, measurement prompt sound, measurement breathing light , unit switching, etc.easily cover your various measurement needs. A single 0-99m practical distance measurement, and a maximum of 99 meters automatic accumulation ultra-long distance measurement. Millimeter-level precision measurement data can be automatically accumulated and subtracted, and 10 groups of historical records can be called at any time, which is convenient and practical. 15mm in thickness, which is convenient for you to carry and measure at any time. Specifications shell material aluminum alloy silicone screen 1.8 inch va lcd screen white characters on black background screen cover 4h super hard plexiglass single ranging maximum 9.99 meters cumulative ranging maximum 99.99 meters accuracy plus or minus 0.5, support no and adjustment backlight time 30-180s buzzer onoff battery type lithium polymer battery battery capacity 200mah 0.74wh charging port type-c color black product size 53 x 15mm package contents 1x measuring tool