1.Great memory capacity,the ibutton can memorize data max to 64k; 2.High security,64 global exclusive serial yards are unable to model; 3.Long uselife,the high-performance lithium battery inside and low consumption ibutton guarantee the data can be stored more than 10 years; 4.Defending static,causticity,attrition,and waterproof etc; 5.Can register 255 exclusive user cards and support offline network function; 6.Widely used in hotel, guesthouse,office and household,etc; Currency: USD Unit Price: Quantity: Delivery: