... USB and RS232 interface AC/DC power, Built in rechargable Lithium battery Paper size: 80mmX20/30m128 patients save/copy/communication 2. Specifications ... , rollLCD display320x240 graphic LCD,display status&waveform.Safety levelIEC60601-1classI, type CFPower supplyAC :110V/220V/110~230V,50/60Hz±1Hz,30VADC ...