Xperia SmartTags: keychains for change settings without touching the phone itself

The smallest key chains allow you to change profiles and settings Xperia-gadget, without touching the phone itself. Just offer it to the phone with support for NFC, and relevant information will appear as if by magic the phone.
You can stock up on by several Xperia SmartTags - a store in the bedroom for the rapid switch to silent mode and set the alarm, another place in the car to call lightning navigation application. More options?