Trasponders...

The passive transponders are without inside battery and they can last in the time without any limit, they can be used for applications read-only (Read Only) and reading and writing (Read and Write).
The passive transponders are employed on court distances and you/they can assume the dimensions more opportune ,they can be installed on or inside things, people and animals.
The passive trasponders have already found great successes in the circle of applications devoted to the safety, to the recognition of the people and the animals, to the logistics and the pre-payment through to plot or special keys, in the production and in the industrial control, you/they can be also beds to distance through the most varied material and don't ask for maintenance.