Casendy Chip Type: RW1990
1 RW1990 ibutton
2. Water
3. Rewritable, DS1990A and TM1990A iButton,
4. Can be copied, RW1990
Technique parameters:
America encryption
Failure rate: 1 / 100,000
Memory: 8KB RAM
Inductive type: Contact
R / W and encrypt
R / W times: 1,500,000,000
Operating temperature: -40 ~ 85
Lifespan: more than 20 years
Rewritable button RW1990A-F5 Read-write card, compatible with ds1990a.
Rewritable, DS1990A and TM1990A iButton, RW1990
64-bit record number;
Integrated Multidrop controller for 1-wire network;
Digital identification by momentary contact
TM card, also known as Contact memory, electronic ke3.5y
Stainless steel package with su304 #,
, never rust, ; Heat-;
Anti-variant; Strong sealing;
For security patrol, sauna door locks, electronic door locks,
Door intercom, card systems, identification, banking,
Communications, rail transportation, transportation and many fields
color: random colors, don't accept the specified color
Material: plastic
size: 16.25x5.89mm

Package Contents:
10 x RFID Contact Memory Key

Only the above package content, other products are not included.
Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.