Passive RFID light-emitting tags are essentially electronic ID cards with built-in "light-emitting skills," consisting of three parts:
※ Passive RFID chip: No battery required; it harvests energy from radio waves emitted by a reader.
※ Miniature energy-harvesting antenna: Converts RF signals in the air into electrical energy.
※ LED light-emitting unit: Lights up upon receiving a command, actively marking its position like a firefly.

Core technological breakthroughs:
※ Passive light emission: Traditional LED tags require built-in batteries, whereas this technology uses RFID readers to transmit micro-energy through the air, achieving microampere-level current to trigger LED "borrowed-power lighting," with a lifespan of over 10 years.
※ Precise triggering: Through specific frequency commands (typically in the UHF band, 860-960MHz), it can individually wake up a target among hundreds or thousands of tags.
※ Millisecond-level response: From receiving the command to lighting up the LED, it takes only milliseconds, making it nearly real-time visible.

At 7:00 AM on March 23, under a grand shower of cherry blossoms, the 2025 Wuxi Marathon and the National Marathon Championships (1st Leg), as well as the Grand Canal Marathon Series (Wuxi Leg), kicked off passionately. Cheers rose and fell, and the roar of the crowd was deafening. In the dawn light, a tide of runners surged through the starting arch, embarking on the 42.195-kilometer journey.

As tens of thousands of runners gathered on the Wuxi Marathon course, where sweat and passion intertwined, a new type of battery-free RFID LED light-emitting tag became the "invisible champion" of the event's logistics support, helping the organizing committee achieve "30-second ultra-fast bag storage and retrieval" and setting a new benchmark for large-scale event services!

An innovative application: This year’s newly added intelligent bag recognition system. When a runner approaches their designated bag storage area, the small light on their bag automatically turns on, making it easier for volunteers to quickly locate it. This "efficiency-boosting, burden-reducing" system delighted runners, who reported, "As soon as I got near my bag storage area, my bag lit up automatically, and retrieval was much faster than in previous years."

In a warehouse stacked with thousands of boxes, a manager anxiously scans with a handheld gun, searching for a box of medicine "produced in May 2024." In a hospital storeroom, a nurse rummages for the last defibrillator of a specific model. In a supermarket backroom, a stocker stares blankly at identical white packaging boxes... Behind these scenarios lies a common pain point in modern asset management and logistics: we know the item we’re looking for is in this area, but we always get lost in the "last meter."

Traditional RFID technology is like a silent guide—it can tell you "the target is within a 20-meter radius" but can’t pinpoint the exact location. An innovative technology called "passive LED UHF RFID" is now teaching items to actively "raise their hands."

These smart RFID tags, less than 1 mm thick, look like ordinary stickers but hide advanced technology. Their built-in miniature energy-harvesting antenna captures RF signals flowing through the air, instantly converting electromagnetic waves into electricity to power an LED. When the reader sends a specific command, the corresponding tag’s LED lights up like a firefly, completing a dazzling transformation from "invisible" to "visible."

Unlike traditional active tags, this system requires no battery. The far-field communication characteristics of the UHF band (860-960MHz) allow the reader to wake up hundreds of tags from several meters away, enabling LED lighting on meter-level tags. Even more remarkably, using directional antennas and beamforming technology, the system can lock onto a specific area like a spotlight, making the desired tag shine alone in a sea of items.

ReadFindIoT has demonstrated strong R&D capabilities in the field of passive LED locating tags. Leveraging Kiloway's leading RFID chip technology, it began R&D years ago, overcoming numerous production challenges, mastering core technologies, and achieving mass production and delivery. Its technological accumulation and product innovation capabilities are mainly reflected in the following aspects:
※ Core technology expertise: Specializing in the development of HF/UHF RFID tags, the core team has over 15 years of industry experience, covering chip design, tag packaging, and software system development.
※ Scenario-based application capabilities: Deeply rooted in industries such as smart manufacturing, automotive, healthcare, and logistics, it develops highly adaptable RFID tag products for complex scenarios (e.g., metal surfaces, liquid environments).
※ Production and customization advantages: With in-house production lines, it supports full-process customization services from antenna design and chip bonding to tag packaging, providing professional RFID tag customization and application solutions tailored to user needs.

Edison Series:
※ Technical features: Uses passive UHF technology, supports long-distance triggering (lighting distance of up to 1-2 meters), and has built-in green LEDs for precise positioning.
※ Application scenarios: Suitable for asset management, library and archive management, warehouse logistics, and other scenarios requiring quick item location.

Honor Series:
※ Technical features: Flexible and durable UHF LED tags that work perfectly on metal surfaces, aiding item location in RFID applications. The tags are printable and support various custom sizes.
※ Application scenarios: Applied to various irregular metal surfaces.

Skai Series:
※ Technical features: UHF PCB LED tags with excellent read/write performance on metal planes. The built-in LEDs enable faster item location.
※ Application scenarios: Suitable for inventory and location of metal shelves, pallets, and other metal items. Custom shapes are available, from miniature to large sizes, and plastic protective shells can be added.

From cable management in data centers and traditional communication industries to large urban events like marathons, from logistics management to smart healthcare, intelligent IoT industry applications are increasingly appearing before our eyes. Shanghai ReadFindIoT embraces the new economy of digital transformation, dedicated to IoT applications and providing RFID tags and customized IoT identification solutions based on RFID+X technology. Turning every "search" into an "instant arrival," we are redefining efficiency standards in the IoT era.