10Pcs RW1990 Rewritable iButton Card, TM tag, TM iButton, Touch Memory Key, Sauna Keys, Copy DALASS DS1990A TM1990A Dropshipping

10 Pcs/Lot RW1990 Universal Intercome Key iButton Key Touch Memory with Handle

Chip Type: RW1990

RW1990 function:

1.RW1990 ibutton

2. Low Cost

3.Waterproof

4. Rewritable, DS1990A and TM1990A iButton,

5. Can copy, RW1990

Technical parameters:

*Dallas Encryption

*Breakdown coefficient: 1/100,000

*Serial Number: Global 64-bit numbers only

*System logic: 64-bit contact protection

*Memory: 8 KB RAM

*Inductive Type: Touch

*R/W and encryption

*B/W times: 1500000000

*Operating Temperature: -40~85

*Lifetime:>20 years

*Dimensions:54*20 mm

*Weight: 4g/pcs

*Parcel: 10Pcs RW1990 keys