RFID PCB is a passive RFID tag that is made of very sturdy FR4 glass fiber material and has a stable printed antenna. Its thick design allows it to perform well on metal surfaces, which makes it widely adopted as an on metal RFID tag, mounted directly on the surface of metal objects like trucks, cans, forklifts, etc. It can also be used on other material surfaces like plastic and wood. To meet different size asset tracking requirements, various dimensions molds have been developed for customers to choose from. They can be made into very small or big sizes.