TagsForDroid NFC Key Chain (NTAG203)
Package contents: 1 NFC Key ChainNFC Chip Specifications:NFC Chip Type: NTAG203Memory Size: 144 bytesRewrite Endurance: 100,000 cyclesLockable: yes (can be made read only)Data Retention: 10 yearsOperating Frequency: 13.56 MHzOperating Range < 2cm (depends on device)Compatibility:  compatible with NFC enabled smartphones (read FAQ for more info)Works with the new Nexus 4 phone and Nexus 10 TabletKeychain:Material: Rigid dark gray plasticDimensions:  36mm x 6mmThese will work perfectly on the Samsung Galaxy S3 and other NFC enabled Android phones. If you are not sure, please consult your phone manufacturer.