Feature 1Read Only: Not writable. If you want to add these tags to your lock, please make sure your lock uses an unencrypted 125kHz frequency. 2Sensitive Induction: With intelligent chip, thickened copper wire, high sensitivity, high frequency, and has fast reading speed. 3Outstanding Features: Innovative technology carefully crafted, fine workmanship, wear resistant and waterproof, drop proof and not easy to break. 4Excellent Advantages: This door lock key fobs is compact, lightweight, easy to carry and store, portable and simple to use. 5Application: Suitable for 125KHz proximity access control system and ID management system, suitable for community access control, attendance, parking lot.SpecificationItem Type:DoorLockKeyFobMaterial: ABS .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Size: Approx. 25x35mm/0.98x1.38inFrequency: 125KHzErase: ReadOnlyPackage List100 x DoorLockKeyFob