Discover our 125kHz Key Fobs (Tags) designed for seamless integration with 125kHz unencrypted systems. Each tag is pre-programmed with a unique 10-digit ID, making identification a breeze. These tags offer versatile compatibility, working effortlessly with EM4100/4102 and similar 125kHz tags. Ideal for RFID door locks, access keys, and elevator access within 125kHz systems, they are crafted from high-quality, rust-resistant ABS material, ensuring durability and a remarkable 10-year data retention capability. Feature: 1.Compatible with all ID/IC access control devices or ID/IC readers. 2.It is used in access keys, elevator keys, etc. 3.Repeatable entry and change times up to 100,000 times. 4.It can keep copying information for up to 10 years without losing. 5.It is made of high quality ABS material, rust and wear resistant. Specification: Condition: Brand New Item Type: Door Entry Tag Color: Blue Material: ABS Optional Type: ID Card (EM4100 5200 125khz) / IC Card (13.56mhz) Card Reading Distance: 0.2-1cm/0.08-0.39in Quantity: 50pcs Anti-interference: Yes Repeated Entry and Change Times: 100,000 (Times) Working Temperature: -25 C -75 C Storage Temperature: -15 C -45 C Package List: 50 x Door Entry Tag Note: Please note that this product can only be read and cannot be rewritten.