HeartStart MRx with the DXL 12-Lead ECG algorithm, provides industry-leading patient monitoring capabilities, exceptional diagnostic measurements, proven resuscitation therapies, and CPR guidance. - ST​/​AR Basic algorithm for arrhythmia detection - ECG monitoring through monitoring electrodes and defibrillation pads - Synchronized cardioversion - Adjustable ECG size and autogain - Manual and AED operation - SMART Biphasic waveform for defibrillation therapy - Large 4-wave color display - Strip chart printer - Individual, adjustable volume of QRS beeper, voice prompts, and alerts - Event summary - Configuration mode - Service mode - Operational checks - Automated self-tests with “ready-for-use” indicator - Lithium ion battery with capacity gauge - ECG out capability Return Policy30 Day Return Policy. Free Return. 60 Day warranty, money back guaranteed!