Brand : Contec Country of origin : China Warranty :1 year Digital Display : Yes Model : TLC 9803 Machine Type : Portable Operating Mode : Automatic Interface : Usb 2.0 Scan speed : 25mm\s+5% Enduring polarization voltage : +300mv Dc polarization sensitivity shift < + 10% Least measuring signal : 50 u V p-p Product safety type : Type B (internally powered) Sampling accuracy : 12Bit