read and writable Touch Memory Key RW1990 ibutton compatible with DS1990A-F5 (pack of 100)

RW1990-f5 can change the code, copy, 64K of memory can read and write "IButton" , Primarily used in some countries Russia, Europe and the United States Turkey and the West,  Material: su304-0.3 Stainless Steel , Size: 17.35mm (diameter) × 6.00mm (height) , Operating temperature: -40 ° C to +85 ° , Waterproof high-temperature, high sensitivity Application: or security patrol, sauna door locks,electronic door locks, door intercom, card systems, identification, banking, Communications, rail transportation, transportation, and so many fields  Package included: 100pcs RW1990 Ibutton.