IC-WG26 iButton Wiegand Reader is sealed and is not afraid of water and dust. Degree of protection IP65

Case  material  is Polyamide.

It is a good conductor of heat and melts at a high temperature. 

So when you set it on a metal surface he is not afraid of fire, because he manages to convey all the warmth of the metal surface .

The size of the reader is only 25 mm. 

It is above the surface only 3 mm. It cannot be brought down from the surface.

The reader is impossible to remove from the outside. 

And even the destruction of his body impossible to gain access to the conductors with which it is connected.

In standby mode, there is a red light. 

At the moment of touch by key fob, the red light will turn off for one second. 

If you connect the yellow wire (LED) with less power (GND) the led will shine only when read key fob.