The QRS pemf mat has the most frequencies of all the pemf mats I've test and has the lowest gauss. (.3 mG). Another high frequency import mat has the highest mG. But if buying a mat for frequencies the QRS has the frequencies that are way more advanced than any other mat I have tested. Many people want the highest powered mat and I believe they should look for a TENS machine or a machine that is based on an electrical massage. The QRS is more of a frequency massage. Most people don't even turn the power level up above 1/2 a gauss. Those looking for higher powered mats should do more research and usually do not know about the magnetic frequencies and are just basing their purchase on high gauss levels. Nearly every person I have to explain the reason why a super high gauss mat has over 100 gauss and the QRS has less than 1 gauss. Most people that do their research who are not looking for a higher charged mat will understand why a lower gauss mat is more expensive with more coherent frequencies. It is very confusing when each manufacturer I come across all trash talk the Qrs mat and say there is no power to it. The original QRS mat came out in 1995. The QR 101 mat is the latest version.