1.Great memory capacity, the Ibutton can memorize data max to 64K. 2.High Speed character, Read-Write can be finished once touch. 3.High security, 64 global exclusive serial yards are unable to model. 4. Long uselife, the high-performance lithium.battery inside and low consumption Ibutton guarantee the data can be stored more than 10 years. 5. Defending static, causticity, attrition, and waterproof etc. 6.The lock can be locked up automatically or manualy.