| 摘要 |
PROBLEM TO BE SOLVED: To respond to a plurality of RFIC(radio frequency identification system) by easily exchanging only data carrier without exchanging wrist watch itself. SOLUTION: On watch body 1 and each of holder 9(9A and 9B) of band 2, three coupling parts in total are provided and in these coupling parts 4, data carriers 5 in ring-shape, rod-shape and disk-shape are provided. These coupling parts 4 are normalized so as to be freely exchangeable to data carrier 5 corresponding to other RFID systems. |
