Unitech 4090-900016G Battery-Free UHF E-Paper Tag
Overview
The Unitech 4090-900016G is a battery-free UHF RFID e-paper tag designed for environments where ongoing battery maintenance is impractical at scale. By harvesting power directly from the RF field of a UHF reader, the 4090-900016G eliminates the replacement cycles and failure risk associated with battery-dependent electronic shelf labels or asset tags — a meaningful operational difference in large warehouse, retail, or logistics deployments where hundreds or thousands of tags may be in use simultaneously.
E-paper display technology retains the last written image without any power draw, so the tag continues showing its label content — price, bin location, SKU, or any other structured data — even when no reader is in range. That passive persistence is what separates e-paper RFID tags from conventional LCD or LED alternatives that go blank the moment power is removed.
Key Features
- Battery-Free RF Power: The tag draws operating power entirely from the UHF RF field during a read/write event. No battery means no scheduled replacement program, no dead-tag downtime, and no hazardous waste disposal — directly reduces total cost of ownership in high-tag-count installations.
- E-Paper Display Persistence: The e-paper screen holds its last-displayed content indefinitely without power. In a warehouse pick-face or retail shelf scenario, the location or price data remains visible to workers even when the reader infrastructure is idle.
- UHF RFID Connectivity: Operating in the UHF RFID band positions this tag for compatibility with standard UHF infrastructure. UHF provides substantially longer read ranges than HF or NFC alternatives, making it suitable for wider aisle or conveyor-side deployments where close-proximity scanning is not practical.
- Manufactured in Taiwan: Country of origin is Taiwan (TW), relevant for supply chain compliance reviews and import classification (HS code 8523520090).
Integration and Compatibility
The 4090-900016G is part of Unitech's RFID labels and tags portfolio. Integration into an existing RFID infrastructure requires a compatible UHF reader/writer capable of updating e-paper display tags — not all standard UHF readers support the display-update command set required by e-paper tags. Confirm reader and middleware compatibility with your Unitech representative before deployment. For broader context on UHF RFID asset tracking solutions, review the RFID and asset tracking category or explore the full Unitech product line.
If you are evaluating tag infrastructure alongside handheld readers, the UHF RFID reader category provides compatible scanning hardware options. For deployments requiring label printing to complement RFID tagging, industrial label printers are frequently paired in warehouse automation workflows.
Frequently Asked Questions
Q: Does the 4090-900016G require a battery?
A: No. The 4090-900016G is entirely battery-free. It draws operating power from the UHF RF field emitted by a compatible reader/writer during communication events. The e-paper display retains its last image without any power source.
Q: What type of display does the 4090-900016G use?
A: It uses an e-paper (electronic paper) display. E-paper holds its last written content indefinitely without power, which is why this tag can show persistent label data — bin locations, prices, SKUs — without a battery.
Q: Is the 4090-900016G compatible with any UHF RFID reader?
A: Not necessarily. E-paper RFID tags require a reader/writer that supports the display-update command protocol specific to e-paper tags. Standard UHF inventory readers may not support display-write operations. Verify reader compatibility before committing to a deployment.
Q: What is the country of origin for the 4090-900016G?
A: The 4090-900016G is manufactured in Taiwan (TW). The import commodity code is 8523520090, which may be relevant for customs and supply chain compliance documentation.
Q: What is the warranty on the 4090-900016G?
A: The 4090-900016G carries a manufacturer warranty. Contact Unitech or your channel representative for specific warranty terms applicable to this SKU.
The defining characteristic of the 4090-900016G is what it does not have: a battery. In high-density shelf-edge or asset-tagging deployments, battery maintenance across hundreds of tags is a recurring labor and logistics cost that compounds over time. RF-powered operation cuts that entirely — the tag is live only when a reader energizes it, and the e-paper display holds its content in between without drawing a single milliwatt.
Technical Highlights:
- Battery-Free Operation: Power is harvested from the UHF RF field at read/write time. No scheduled replacement cycles, no dead-tag alerts at 3 AM, no battery inventory to manage across a warehouse floor.
- E-Paper Display Persistence: Once written, the display holds its image indefinitely — zero power consumption between updates. In a pick-face application, workers see current bin or SKU data on the tag face without any active infrastructure needed nearby.
- UHF RFID Band: UHF delivers read ranges well beyond HF or NFC — better suited to aisle-width scanning and conveyor-side identification where you cannot guarantee close-range contact with each tag.
Deployment Considerations:
- Confirm that your UHF reader infrastructure supports e-paper display-write commands before ordering at volume. Standard inventory-mode UHF readers handle EPC reads but may not support the proprietary or extended command set needed to update the visual display on the 4090-900016G.
- Available quantity is currently listed at zero in distribution — check current lead times before building this tag into a project timeline with a hard go-live date.
The 4090-900016G is best positioned for retail shelf-edge labeling, warehouse bin identification, or any high-tag-count fixed-location application where eliminating battery logistics is the primary operational driver and a compatible UHF display-write infrastructure is already in place or being specified simultaneously.
