... data can be stored permanently, and don't lost.7,Low power consumption, multi-function, small size, convenient ... /h. 9,With accumulated dose memory function, after power-failure, data can be stored permanently, it can ... LCD, battery label full of three grids, the power is about 2.8V-3.2V, battery label ... 2.1V, it is in the state of less power. 11,Working environment requirements:Temperature-10 - +50°C ...