ibutton

1, It is plastic housing with a microchip inside containing a unique serial code which is then related to a check point . 2, Anti-destroyed & Waterproof, anti-corrode, fit for every environment3, Non-contact EM-ID card 4, Long lifetime: >20 years5, High sensitive and Long inductive distance 6, Wide temperature scope: -40+707, Not need power supply8, Original USA material, warranty: 5 years.

ibutton for guard tour system