This would be a useful gadget. The idea is to have a transponder that can be attached to an object and a master transponder that sounds an alarm if the distance between the two transponders exceeds a certain limit. I don’t know much about electronics but being able to set different distances for the alarm to trigger would be beneficial for different uses. The small transponder could be attachable to an item or placed in a pocket, desk or appropriate place of alert. The slave transponder would be smaller to allow easy attachment and positioning. The master transponder wiould need to be slightly larger to accommodate a fairly audible alarm.

Slave & Master Transponders

Uses could include:

1. Warning that your wallet/purse etc has been removed after it exceeds a meter (or set distance) from the main alarm transponder in your pocket.
2. Placing the transponder in your childs pocket that warns if your child wanders more than a certain distance from you.
3. Attaching the transponder to your laptop or portable device that sounds if it leaves a certain area such as your desk.

I’m sure this list could be extended on for different uses and the technology could probably be implemented into mobile phones etc. It is often unknown when and where you may have had an item stolen but even if the theft isn’t prevented by the alarm, at least you would be aware of the place and time of the incident for Police and Insurance reports etc.