So is the Cel-FI RS2 Signal booster safe? We actually test the Cel-Fi units like a phone for a SAR rating. Anything with a SAR rating of less than 2.0 is defined as ‘touch safe’. Both the Cel-fi window unit and coverage unit have a SAR rating below 2.0.
Technically measuring SAR is usually only done for hand-held or body worn devices so WiFi routers generally don’t have a SAR rating. In any case the power we emit is no greater in general than other consumer wireless networking devices and smart phones.