... examination.6,With accumulated dose memory function, after power –failure, data can be stored permanently, and ... don't lost.7,Low power consumption, multi-function, small size, convenient taking. ... of three grids, the power is about 2.8V-3.2V, battery label full of two grids, the power is ... about 2.5V-2.8V, battery label full of one grid, the power ...