Rfid Chip Today

These have no battery. They "wake up" only when they enter the radio field of an RFID reader, drawing just enough power from the reader's signal to send back their information. They are incredibly cheap (often costing less than $0.10) and are used for retail items, library books, and event wristbands.

A coiled or looped wire (often made of copper or aluminium) that receives radio signals from a reader and transmits the chip's data back. rfid chip

A tiny piece of silicon that stores and processes information, such as a unique serial number or biometric data. These have no battery

These contain their own battery, allowing them to broadcast signals continuously over much longer distances (up to 100 meters or more). Because they are more expensive, they are typically reserved for high-value assets like shipping containers or vehicles. A coiled or looped wire (often made of