Welcome to the store! Read-only functionality; cannot be written to. Ensure your lock uses an unencrypted 125kHz frequency if you intend to add these tags. Features intelligent chip and thickened copper wire for sensitive induction, high sensitivity, high frequency, and fast read speed. Utilizes innovative technology with fine workmanship, offering excellent performance, durability, and water resistance. Compact, lightweight, and portable design for convenient use and storage. Widely applicable for 125KHz proximity access control and ID management systems, suitable for community access, attendance control, and parking lots. Item Type: Door Lock Key Fob Material: ABS Size: Approx. 25 x 35 mm / 0.98 x 1.38 inches Frequency: 125 kHz Erase: Read-only Package Includes: 100 x Door Lock Key Fobs Your 100% satisfaction is our top priority. We are committed to providing the best service. If you encounter any issues upon receiving the product, such as damage or incorrect quantity, please contact us immediately for the best solution!