... Japanese display functions, state display at a glance.3,When measuring radiation dose rate, display dose rate ... taking.7,Simple operation and easy to use.3. Main Technical Performances 1, Through GM counter ... with high sensitivity, will respond to the natural environment.3, Radiation occasions: beta gamma x rays.4, ... three full grids, power is about 2.8V-3.2V, when battery shows two grids, the power ...