Technical Specification :
High Resolution Thermal Printing System
Frequency response is as high as 150Hz
Capable of printing continuously on channel trace
  and annotations including lead mark and parameter
  such as sensitivity, paper speed and filter operation
  status
High resolution digital filter inhibits baseline drift
  without affecting ECG waveform
One-touch Operation
Concept of floating input circuit meets IEC safety
  standard
Rechargeable battery supporting more than 50
  patient examinations
Lead Standard: 12 leads