Accurate pacing pulse identification and automatic analysis function Manual / Auto / Examination / Storage Modes.[Freeze] function can replay 12 seconds cardiograph front and back. Examination is finished quickly under the [Examination] mode, saving energy and paper. Store and replay cardiograph without printing parameters or diagnosis under the [Storage] mode. Clinical information input [ID/Name/Sex/Age]. 12 leads wave forms play, with 250 patient information storage (Expandable). 800*400 graphic 5 inch color screen LCD. Built-in rechargeable Li-Ion battery. Adapt to 110-230V,50/60Hz power supply. USB interface allows net transfer, USB flash disk and USB printer (optional) connected. ECG NET software optional