Check the listing for details. 125KHz RFID EM ID Inductive Tag Token for Guard Tour Patrol System Checkpoint. Condition: New. Listed at 13.99 USD. Document Features Uses EM format RFID signal:125Khz Non-contact reading Passive and no power required for operation Readable distance: 0-60mm / 0-2.36in Material: ABS Very durable (Over 20 years usage life) Completely waterproof, all-weather that can be used reliably in rainy, snowy, dusty, or other adverse environments Passive and no power required for operation Each card come with a unique ID number,but the ID number not print in the case Dimension: Diameter 40mm/1.57in Thickness: 4mm / 0.16in Applicable to patrol, trees, animals, access, public transportation, parking, identity authentication, attendance management, ticket, card payment, product identification, etc. Note This EM/ID signal card/button shape are used together with our guard tour hand-held readers. They are completely waterproof. Can be operate in wide temperature ranges. Suitable for being mounted on wall and it is designed with backlight so easily be identified in poor light condition, those signal cards can be read without contact.They are the ideal replacement products for contact-based guard tour checkpoints. Package 10 x Tag or 50 x Tag or 100 x Tag (According to your choice)