Blackfrog Technologies Pvt. Ltd. is a Manipal, KA based technology startup company that seeks to improve the efficiency of immunization supply chains. We have developed a patented system for precision cold-chain and vaccine traceability with support from BIRAC (DBT) and leading impact investors in the nation including Venture Centre (NCL, Pune) and Social Alpha to provide logistical support in the last-mile delivery of vaccines.Emvólio is a portable, battery-powered refrigeration device that will strictly maintain any preset temperature for over 12 hours for last mile transport of vaccines. Emvólio's 2-litre capacity enables it to carry 30- 50 vials, which is standard for a daylong immunization campaign. Further device capabilities include continuous temperature monitoring, location tracking, state-of-charge indication, communication with headquarters via live tracking, and vital statistics for improved coverage.