870-621-10 Proximity Secure Key Ring Tag Reading range of 50mm Fast response High impact, robust polycarbonate housing No battery - infinite number of reads Compatible with existing GSC PSR series proximity readers Waterproof and dustproof to IP66 Unique 32 bit ID number - over 4 billion codes Drop resistance - 100 times from 2m. Datasheet 870-621-10 Proximity Secure Key Ring Tag Close You might also be interested in: 870-621-30 ProxNet Secure Proximity Credit Card