... 000.000-999.999msv5, Energy response: <±30% (50KeV-1.3MeV).6, Relative basic error: <±10%(135Cs Source 662 ... rate threshold alarm: alarm threshold value: 0.5,1.0,2.5,10,30,50usv/h. 9, With ... failure, data can be stored permanently, it can undertake 1 million times storage and erased. 10, Battery voltage indication. ... battery shows one grid, the power is about 2.1 V-2.5V, when battery shows without grid , ...