¡ñ compact in size, easy and direct operation, portable Working modes: manual / auto / arrhythmia analysis 50mm, single channel format recording Accurate automatic interpretation function 20¡¡§¡é2 graphic character display Lead-off indicator Automatic adjustment of baseline Built-in ecg simulator Adapt to 110-230v, 50/60hz power supply Built-in rechargeable ni-mh battery High resolution thermal printing