rfid key fob/ rfid keychain is made of ABS housing, small and exquiste shape, which very easy to carry to be hung on the keychain. Goodwin rfid key fobs are with a variety of shape design and bright color, thereby making it a versatile product suitable for many different environments and applications. Each RFID Key fob types is embedded with a small rfid antenna and a rfid chip (with unique ID/UID Code), and will be passively to read to get access when pass the reader/writercolors. . These rfid key fob are widely used in access control, time attendance, identity authentication, hotel locks payment, etc.