According to ZOLL's president, Jonathan Rennert "The X Series has every advanced monitoring and communication capability required by EMS providers and, ultimately, critical care transport operations."
The X Series is described as about half the size and half the weight of competitive full-featured monitor/defibrillators, yet is much more powerful and built to the most extensive standards for ruggedness.
Weighing less than 12 pounds (6 kilograms), the X Series is compact without compromise in capability, performance or display size. This monitor/defibrillator combines ZOLL defibrillation, pacing and CPR assistance with advanced monitoring and built in communications.
The device incorporates the rainbow SET patient monitoring technology made by Masimo, as well as a non-invasive blood pressure measurement module made by Welch Allyn.
More details: http://www.zoll.com/medical-products/defibrillators/x-series/