Tamper-Proof Rewritable RFID Livestock Ear Tags
Frequency:134.2Khz
Color:Yellow
Product name:Livestock Ear Tags
Custom RFID Livestock Ear Tags for Cattle, Sheep, Goats and Pigs
SynTek supplies 134.2kHz RFID livestock ear tags for farms, breeding companies, livestock traceability projects, distributors, and animal identification system integrators. Built with an embedded EM4305 read/write chip, these tamper-proof electronic ear tags support animal ID management, ownership transfer, breeding records, vaccination records, and internal farm data updates without replacing the tag.
The closed-head locking structure is designed for secure one-time attachment. Once installed with a compatible applicator, the tag provides clear tamper evidence if unauthorized removal is attempted, making it suitable for cattle traceability programs, disease control projects, breeding herd management, and bulk livestock identification deployments.
For buyers planning a bulk livestock ear tag order, SynTek can support chip programming, ICAR-style numbering, laser marking, logo customization, color options, sample testing, and private-label packaging through our OEM & ODM RFID customization service.
Field-Reprogrammable EM4305 Memory
The EM4305 chip supports read/write operations, helping farm managers and system integrators update animal-related information during the animal lifecycle. Compared with fixed-ID tags, writable RFID cattle ear tags reduce re-tagging work when ownership, health records, breeding status, or internal management codes change.
Manufactured from durable TPU material for RFID ear tags, these weather-resistant electronic animal tags are designed for outdoor livestock environments, UV exposure, rain, mud, disinfectant contact, and long-term animal movement. The flexible round button shape helps reduce irritation while maintaining reliable tag retention in active cattle, sheep, goats, and pigs.
Quick Answer for Buyers
What is this product used for?
It is a passive RFID livestock identification tag used for cattle, sheep, goats, pigs, and similar livestock. It helps farms and traceability programs identify individual animals with a compatible 134.2kHz RFID reader.
Why choose EM4305 writable tags?
EM4305 read/write memory is useful when buyers need programmable animal IDs, editable internal records, or pre-encoded numbering before shipment instead of simple read-only identification.
Who should buy these tags?
They are suitable for livestock farms, dairy operations, animal health projects, government traceability programs, RFID system integrators, distributors, and OEM animal tag brands.
Can the tags be customized?
Yes. SynTek supports custom color, laser numbering, logo marking, UID or ICAR-style encoding, package labeling, and bulk order customization for project deployment.
Technical Specifications
Key parameters for ISO 11784/11785-aligned, reprogrammable animal tracking ear tags
| Product Type | Passive RFID livestock ear tag / electronic animal identification tag |
|---|---|
| RFID Chip | EM4305 read/write chip |
| Operating Frequency | 134.2kHz Low Frequency (LF) |
| Protocol Standard | ISO 11784 / ISO 11785 FDX-B and HDX compatible options; project requirements should be confirmed before encoding |
| Memory Function | Read/write memory for programmable animal ID and internal management data |
| Data Retention | 20+ years under normal passive tag conditions |
| Typical Read Distance | About 5-10cm depending on reader model, antenna design, tag orientation, and operating environment |
| Tag Material | Flexible TPU for outdoor livestock use |
| Tag Size | Ø30mm standard button size; custom size can be discussed for specific projects |
| Standard Color | Yellow; custom colors available for herd, farm, or distributor classification |
| Operating Temperature | -25°C to +70°C |
| Security Feature | Closed-head tamper-proof locking structure |
| Personalization | UID programming, ICAR-style encoding, laser number, farm logo, barcode or QR code printing, and private-label packaging |
| Applicable Animals | Cattle, dairy cows, beef cattle, sheep, goats, pigs, and similar livestock |
| Recommended Reader | Compatible 134.2kHz animal RFID reader, stick reader, handheld scanner, or fixed reader depending on project workflow |
How to Choose the Right RFID Animal Tag
Different animal identification projects require different RFID frequencies and tag formats. Before placing a bulk order, buyers should confirm the animal type, reading distance, management system, encoding format, reader compatibility, and regulatory requirements.
| Option | Best For | Recommended Internal Link |
|---|---|---|
| 134.2kHz LF RFID ear tag | Official animal ID, close-range reading, cattle chute management, sheep/goat flock records, disease traceability | 134.2kHz LF animal ear tag |
| UHF animal ear tag | Longer-range inventory counting, raceway reading, farm gate monitoring, large herd counting applications | UHF animal ear tag options |
| RFID animal microchip | Permanent pet ID, veterinary identification, small animal tracking, implantable identification programs | RFID animal microchip products |
| Animal ear tag reader | Reading, checking, writing, and verifying electronic livestock tags during sample testing or daily farm operation | animal ear tag RFID readers |
Why Choose SynTek Tamper-Proof Writable Livestock Ear Tags
Factory-direct production, programmable chip options, tamper-evident structure, and OEM support for industrial-grade livestock identification projects
Closed-Head Tamper-Proof Lock
The one-way locking structure helps prevent unauthorized removal or fraudulent tag replacement. This is important for high-value breeding herds, official traceability, disease control, and livestock ownership verification.
EM4305 Reprogrammable Chip
The writable RFID chip allows project teams to pre-program ID ranges, update management codes, or align tag data with farm software. It is a practical choice for OEM RFID cattle ear tags and customized traceability projects.
Direct RFID Factory Source
With 17+ years of RFID manufacturing experience and in-house production capability, SynTek supports stable batch supply, custom packaging, project documentation, and factory-direct communication for distributors and system integrators.
Quality Control Before Shipment
Production can include chip function testing, read/write verification, visual inspection, locking structure checks, laser marking confirmation, and sample reader testing before mass shipment.
Application Scenarios
Cattle Breeding & Dairy Operations
Use RFID cattle ear tags to identify animals at feeding stations, milking points, weighing areas, breeding records, and health check workflows. Writable memory supports data updates when animal status changes during the production cycle.
Sheep & Goat Flock Management
Electronic sheep and goat ear tags help farms manage flock movement, medication records, breeding groups, and individual animal identification. Custom color or number marking can simplify grouping in daily farm operation.
Pig Farm Identification
RFID ear tags for pigs support growth-stage tracking, medication records, feeding management, and batch traceability. The TPU tag body is designed for active animals and repeated outdoor or barn use.
Government Traceability & Disease Control
For livestock movement tracking, disease prevention, and official identification programs, buyers can request project-specific numbering, ICAR-style code preparation, documentation support, and compatible reader recommendations.
OEM Customization and Bulk Order Workflow
For wholesale RFID livestock ear tag buyers, sample validation and encoding confirmation are more important than only comparing unit price. SynTek recommends confirming the following details before mass production.
| Step | What SynTek Confirms | Why It Matters |
|---|---|---|
| 1. Requirement review | Animal type, frequency, chip type, reader model, target market, and project quantity | Prevents mismatch between ear tag, reader, and farm management software |
| 2. Encoding plan | UID range, ICAR-style numbering, fixed data, writable memory requirement, and printed number format | Ensures each tag is traceable and ready for deployment after delivery |
| 3. Sample testing | Sample tags can be checked with the buyer's reader or SynTek's stick ear tag reader | Reduces risk before bulk production and confirms real-world read performance |
| 4. Custom production | Logo, color, laser number, barcode, QR code, packaging label, and carton marking | Supports OEM branding, distributor resale, and project installation management |
| 5. Final QC and shipment | Chip function check, visual inspection, quantity confirmation, and export packaging | Improves batch consistency for industrial-grade livestock identification projects |
Ready to test samples or request wholesale pricing? Submit your project details through the RFID livestock ear tag inquiry form.
Reader Compatibility and System Integration
RFID livestock ear tags should be tested with the actual reader used in the farm or traceability system. Read distance can vary depending on reader antenna size, firmware, tag orientation, animal movement, metal structures, and installation workflow. For new projects, SynTek can recommend compatible animal ear tag RFID readers for reading, checking, and writing 134.2kHz livestock tags.
- Handheld reading: suitable for veterinarians, small farms, livestock inspection, and mobile animal checks.
- Stick reader workflow: suitable for chute-side cattle reading, flock checks, and batch verification.
- Fixed reader workflow: suitable for gate, raceway, weighing station, or feeding station integration.
- Software integration: confirm data format, reader output, and encoding rule before mass production.
Certifications, Standards and Quality References
SynTek supports quality documentation for livestock identification projects and can provide related certificate information upon request.
Useful External Standards References
For buyers evaluating animal RFID compliance, the following independent references may help confirm project requirements before ordering:
Regulatory Fit: Where These Tags Can and Cannot Be Used
Official livestock identification is regulated at national level, and no single ear tag is approved everywhere. Below is a direct statement of where this product fits, so you can confirm eligibility before requesting a quote rather than after receiving samples.
Two different jobs, two different tags
Official identification devices are approved by a national authority, carry a government-controlled numbering range, and are the legal identity of the animal for movement, trade, and disease control. Approval is per-country and per-species.
Management identification devices are used for on-farm and in-project animal records:herd management, breeding, feeding, weighing, veterinary history, internal traceability,and closed-loop supply chain projects. They are not restricted by national approval lists,and in most jurisdictions they may be applied alongside an official tag in the other ear.
These SynTek EM4305 tags are supplied as management identification devices, and as project devices for programmes that specify their own numbering.
Jurisdiction check
| Market | Requirement for official ID | This product |
|---|---|---|
| United States | Since 5 Nov 2024, official eartags applied to covered cattle and bison moving interstate must be both visually and electronically readable: 15-digit AIN starting 840, US shield, "Unlawful to Remove", from an APHIS-approved manufacturer | Not an official 840 device. Suitable for herd management, feedlot records, and private traceability alongside official tags |
| Australia / New Zealand | NLIS-accredited devices only; the Australian sheep and goat system is HDX-based, with a birth-year colour scheme (white 2025, orange 2026, light green 2027). Full mandate for all sheep and farmed goats from 1 Jan 2027 | Not NLIS-accredited, and FDX-B rather than HDX. Non-accredited eID tags must be removed before an animal leaves the property |
| England | Bovine EID becomes mandatory for newborn calves in 2027, using low-frequency (LF) technology, reported through the Livestock Information Service | Same LF band (134.2 kHz), but official calf tags must come from a Defra-approved supplier. Usable as a management tag in the second ear |
| EU member states | National competent authority approval; most schemes require ICAR device certification | Not currently ICAR device-certified. Usable for management and for private breeding programmes |
| Projects with their own numbering | Set by the programme operator | Direct fit. We encode to your specified structure and lock the record before shipment |
On ICAR certification
ICAR (International Committee for Animal Recording) is the registration authority that certifies animal identification devices and allocates manufacturer codes under ISO 11784 and ISO 11785. Certification requires laboratory testing of device composition,environmental performance, and transponder conformance at an ICAR-accredited test centre,and is granted per tag design for five years.
Manufacturer codes work in two tiers: a shared code (900) allocated with a restricted ID range per registered product, and unshared codes (901-998) granted only after a company documents sales of at least one million ICAR-certified transponders per year across two consecutive years.
We state plainly that these tags are not ICAR device-certified. What we do provide is encoding to an ISO 11784 code structure of your choosing, including your own registered manufacturer or country code if you hold one. If your project requires a certified device,tell us at enquiry stage and we will say so rather than ship tags that will fail acceptance.
When to choose something else
- You need tags accepted for interstate cattle movement in the US → an APHIS-approved 840 device
- You are tagging sheep or goats in Australia → an NLIS-accredited HDX device
- You are tagging newborn calves in England from 2027 → a Defra-approved LF calf tag
- You need long-range gate or raceway counting rather than close-range identification →see our UHF animal ear tags
Build a Complete Animal RFID Identification Solution
Depending on your project, RFID ear tags may be combined with related animal identification products and readers. These internal resources can help buyers compare options before submitting a project inquiry.
- RFID animal ear tag product category for cattle, sheep, goats, pigs, and livestock identification.
- UHF animal ear tags for longer-range reading and large herd counting applications.
- RFID animal microchips for implantable pet and small animal identification.
- Guide to choosing LF and UHF RFID animal ear tags for frequency selection.
- Contact SynTek to discuss samples, encoding, packaging, and bulk shipment details.
FAQ
Q: What makes these RFID livestock ear tags rewritable?
A: These tags use an EM4305 read/write chip, allowing compatible 134.2kHz RFID reader/writers to update supported data fields. This is different from simple read-only ear tags where the ID is permanently fixed during production.
Q: Are these RFID cattle ear tags suitable for bulk orders?
A: Yes. SynTek supports bulk livestock ear tag orders for farms, distributors, animal health projects, and system integrators. Buyers can request sample testing, encoding confirmation, logo marking, color customization, and export packaging before mass production.
Q: How does the tamper-proof closed-head design work?
A: The closed-head design uses a secure locking structure that is intended for one-time attachment. If someone tries to remove or replace the tag without authorization, visible damage or tamper evidence is likely to occur.
Q: Are these tags compatible with ISO 11784 and ISO 11785 animal readers?
A: The tags are designed for 134.2kHz animal identification applications and can be configured for ISO 11784/11785-aligned projects. Because different readers and project regions may use different settings, buyers should confirm the required encoding format before production.
Q: What animals are these electronic ear tags suitable for?
A: These durable RFID ear tags are suitable for cattle, dairy cows, beef cattle, sheep, goats, pigs, and similar livestock. For very small animals or permanent pet identification, an RFID animal microchip may be more suitable.
Q: Can you provide OEM RFID cattle ear tags with custom logo and numbering?
A: Yes. OEM customization can include tag color, farm logo, distributor branding, laser number, barcode, QR code, UID programming, ICAR-style encoding, private-label packaging, and carton labels.
Q: What should I confirm before ordering custom RFID livestock ear tags?
A: Please confirm animal type, quantity, chip type, frequency, required protocol, reader model, encoding rule, visual number format, color, logo, packaging, target delivery date, and whether samples are required before mass production.
Q: Can SynTek recommend a compatible reader for these tags?
A: Yes. SynTek can recommend handheld, stick, or fixed animal ear tag readers depending on your reading distance, farm workflow, data collection method, and integration requirements.
Q: How can I start a sample test or wholesale inquiry?
A: Send your project details through the inquiry form or contact SynTek with your chip, frequency, encoding, quantity, and customization requirements. Sample testing is recommended before large-scale deployment.
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