... rate50GSa/sInput impedance 1MΩ//13pFInput coupling DC, AC, GNDTrigger Edge, video, pulse, delayAcquisition modesAuto, normal, singleTrigger sourcesCH1, CH2, Ext, Ext/5 ... manual Dimension 303(W)×145(H)×288(D)mmWeight 5kg Video link: http://v.youku.com/v_show/id_XNTAwNDE4Njg4.html*Specifications are ... . MCH Digital Oscilloscope,DS-2040CA digital oscilloscope,40Mhz bandwidth,color display,dual channel