Hello Gayanjith Premalal further thoughts: your device will emit only in certain conditions => i.e. rarely. If you combine it with bluetooth like communication protocole (i.e. low emission protocole), I don't think this will be a problem. Another option is to put the pendant on baby ankle. I think this is something people do a lot in India?
Gayanjith Premalal Regarding the business model, maybe you can check out and get some inspiration from this project http://sunna-moon.com it's in french but I guess you can get the essence. It's a combinaison of lighting system and mobile for communities in Africa who don't have access to electricity.