It is high security and easy to operate.
It is made from steel and metal.
The max. capacity for the cards:
System card: only one piece
Master card: 3
Guest card: 12
Working voltage: DC6V (with 4 Alkaline batteries)
Static current: <60 uA typical: 30 uA
Operative state: <450 mA
Sensitive distance: >2.5 cm