... reportBuild in rechargeable Ni-MH batteryChinese/English languageSimultaneous 12 leads320X240 graphic LCD, 3.8 inch screenPaper size: 50mmX20/30mBuilt in RS232 interface ... ,5,10,20mm/mVRecording modeThermal Array printingPaper specification50mmx20m,rollLCD display320x240 graphic LCD,display status&waveform.Safety classificationIEC60601-1 class I, type CFPower ...