Our devices are CE-compliant and therefore also comply with all legal standards. The GPS trackers also transmit actively, but the data transmission only takes place when there is movement and with a significantly lower data load than, for example, with a smartphone and the existing standard apps.
However, if you have problems carrying mobile phones close to your body, we would also advise against wearing the GPS device close to your body to be on the safe side. Basically, however, it can be said that the radiation exposure of GPS trackers, compared to a smartphone, is rather harmless.
If possible, the finder should therefore not be worn at chest height, e.g. rather on the trouser belt, so that he has enough distance from the pacemaker.