Low weight and compact size Touch screen and touch key for easy operation High resolution thermal printer, recoding frequency response ¡Ü150Hz 12-lead gathered and amplified simultaneously, 3-channel built-in printer. Automatic mode and manual mode optional Color TFT screen with 640¡Á480 dot or 480¡Á272 dot Built-in rechargeable Li battery with high capacity Prompt information for lead off, lack of paper and low battery capacity etc. Automatic adjustment of baseline for optimal recording Standard input/output interface and RS232 communication interface for linking to special network and setting up ECG databas