This is ID Card Keychain Door Access Control Blue TK4100. It is used in patrol system, attendance systems, access control systems, enterprise systems, radio frequency identification field etc..<!--Features --><p>FEATURES</p><ul class="p_f"><li>Small and exquisite appearance, durable, does not fade</li><li>You can hang it on the key ring. Very easy to carry</li><li>This ID card spray one inner code on its surface</li><li>Data storage using EEPROM, the data stored for more than 10 years</li><li>A total of 64-bit data storage capacity, including manufacturers, distributors and users of the code</li><li>Through special equipment, you can copy the same number ID card</li><li>Typical Applications: Patrol system, attendance systems, access control systems, enterprise systems, radio frequency identification field</li></ul><!--Specifications --><p>Specifications</p><table width="100%" border="0" cellpadding="0" cellspacing="0"><tbody> <tr> <td width="131">Chip</td> <td width="365">TK4100</td></tr> <tr> <td width="131">Operating Frequency</td> <td width="365">125KHZ</td></tr> <tr> <td width="131">Sensing Distance</td> <td width="365">8 - 20 cm</td></tr> <tr> <td width="131">Working Temperature</td> <td width="365">-10 ~ +50&#8451;</td></tr> <tr> <td width="131">Material</td> <td width="365">Plastic</td></tr> <tr> <td width="131">Color</td> <td width="365">Blue</td></tr> <tr> <td width="131">Size</td> <td width="365">2.8 x 3.5 x 0.5 cm / 1.1 x 1.38 x 0.2 inch (L x W x H)</td></tr> <tr> <td width="131">Weight</td> <td width="365">5g / 0.18oz</td></tr></tbody> </table><!--Package Includes --><p>Package Includes</p><ul><li>1 x ID Card Keychain Door Access Control Blue TK4100</li></ul><!--Extra Info --><!--produts_compatibility -->