... with interpretiveBuild in rechargeable Li batteryChinese/English languageSimultaneous 12 leads320X240 graphic LCD, 3.8 inch screenPaper size: 63mmX20/30mBuilt in RS232 interface ... ,10,20mm/mVRecording modeThermal Array printingPaper specification63mmx30m,rollLCD display.320x240 graphic LCD,display status&waveform.Safety classificationIEC60601-1 class I, type CFPower ...