It has a unique, inviolable code, engraved by the manufacturer and with no possibility of fraud. 

Its structure is made of stainless steel, offering high mechanical resistance; The digital reading of the data is done by contact with the reader; 

The maximum time to read the data is 5ms;

It does not use internal batteries, the power is supplied only during contact with the reader; Operational: 

Reading the iButton number is done by physical contact between the reader and the component. 

Data Format: One Wire 

Units per package: 100 

• iButton F5 keychain with silkscreened code; 

• Tag produced entirely in metal; 

• Key ring attached; 

• Single 64 Bit Code; 

• Used to control the registration of people; 

• Coin-shaped profile tag; 

• Compatible with ibutton Reader. 

• Model:

  TM1990A-F5

• Reading time:

  5ms

• Operating range:

  2.8V a 6.0V

• Operating temperature:

  -40°C a +85°C

• Dimensions :

  55x20mm

• Weight:

  4,5g

• Color:

  Black