... storage2GB,SD cardOperation ModeTouch screenTriggerSignal triggerPortsUSB portNoise voltage of the system≤2 mVDynamic range³184 dBAmplifier frequency ... , max. wave velocity, avg. wave velocity, numbers of piles of type Ⅰ,Ⅱ,Ⅲ, etc., and can generate a comprehensive excel ... and multiple format printing capabilities, and column/row editing functions. Built-in help systemStandard Configurations:China Coal ...