Demonstration:https://www.youtube.com/watch?v=bNKgNsU4kxo https://chrome.google.com/webstore/detail/valuetag/jfmdbmmnl...
Good thing is they also have android application which does much more. Demonstration: https://www.youtube.com/watch?v=i-8HNe-UOok https://play.google.com/store/apps/details?id=com.copperpix....