What is this? The RFID ID card is widely used for identification, such as door entry access control systems, residential property elevators, parking lot management, public transportation, hotel management, etc. What will I get? Color: Black Material: ABS Shape: Oval Applicable Frequency: 125KHz Body Size: 36x29x5.6mm / 1.42x1.14x0.22 inch (L*W*T) Package Includes: 20 x ID Card Key Fobs Are there any advantages of the product? This proximity ID token tag has characteristics of small appearance, not fade, waterproof, easy to carry, can be hung on the key, durable and long service life. How to use it? The 125KHz RFID card only can be read, and can not be reprogrammed or rewritten. What should I notice? Individuals cannot use it directly; it needs to be entered into the system by the property staff or management staff and then activated to use.