Welcome to the store! 1. 13.56MHZ working frequency, highly sensitive, 1.2-2 inch sensing distance (depending on card reader), 0.1-second sensing time. 2. Wide applications, ideal for access control, time attendance, elevators, parking lots, hotel door locks, etc. 3. Adopts UID chip, 1K storage capacity, erasable lifespan of over 100,000 times, and data storage up to 10 years. 4. Made of high-quality PVC material, lightweight, flexible, anti-corrosion, and durable for long-term use. 5. A total of 50pcs access cards, which can fully meet your needs, practical and economical. Item Type: IC Access Card Material: PVC Purpose: Access control, time attendance, elevator, parking Chip Type: UID Storage Capacity: 1K Working Frequency: 13.56MHZ Diameter: Approx. 25 mm/1 inch Read Distance: Approx. 3-5 cm/1.2-2 inches Read and Write Time: 67 milliseconds Working Temperature: -20 to 55°C Erasable Lifespan: >100,000 times Data Storage: 10 years Application: Applicable to access control, hotel door locks, employee attendance, campus access control payment, identification and security systems, parking lot access control payment, social security management, transportation payment, municipal and utility payment, etc.