YRP Ubiquitous Networking Laboratory has claimed to have developed the world's smallest active RFID tag, dubbed "Dice". Measuring 15mm cubed, the tag includes a battery that can be used for about two years and three months -- assuming communication every five minutes -- and can perform two-way communications within a range of 10 meters under optimal conditions. The tag uses the 315MHz band, supports DES (Data Encryption Standard) algorithms, and can integrate a sensor. Developers say that pilot testing will be completed during 2005.