... other sizes shapes are availableRFID key chain tag is also named as RFID key chain,key fob,key finder,key ring,key holder.It is a more ... The tag are available with broad range of RFID technology, from low frequency 125KHz EM unique, Atmel T5567, Hitag etc tohigh frequency ... the tag.Below are you more technical information for RFID Key Tag RFID key chain Tag IC feature-125KHZ chips: EM4102,EM4200,EM4550 ...