(Source: Index card file, Operation High Time -- http://www.simegen.com/sgfandom/rimonslibrary/oht.html) Invented by Mairis Farris. Finger ring, worn on the third finger of each hand, which reduces a sime's perception of selyn fields. Mechanism reduces affects of field gradients with no cumulative discomfort with a damper. Meant to replace retainers. Digen does get them manufactured and on the market in Sime Territory within a month.