Praesidium’s patented BioFi technology uses proprietary artificial intelligence and machine learning algorithms along with state-of-the-art sensors to find and track human vital signs from a distance, through solid objects, and without any touch or contact with the person being monitored. ​Praesidium’s BioFi technology has been honed over the last 6+ years. It accurately and precisely detects, tracks and measures human vital signs without any physical contact (up to ~6 feet from a subject). This can be done through materials like bed frames (including hospital beds), mattresses, box springs, clothing, and even through walls if needed.