RFID Key Tags Explained
RFID Key Fobs Explained: Types, Frequencies, and How to Duplicate
This expert guide breaks down how RFID key fobs work, the differences between low‑, high‑, and ultra‑high‑frequency systems, and safe, compliant ways to duplicate or replace a fob. You’ll also find a buyer’s guide, security tips, and answers to common questions.
What is an RFID Key Fob?
An RFID key fob is one part of an access control system consisting of a tag (the fob) and a reader. Inside the fob are two core components: (1) a microchip storing a unique identifier and (2) a coiled antenna that receives and transmits data. When you present the fob, the reader authenticates the ID and allows or denies access.
Unsure Which Tag You Have?
If you don’t see your tag in our product listing or aren’t sure which one you have, email a clear photo to support@sumokey.com. Our team will help identify your tag and confirm compatibility.
Active vs. Passive RFID
Passive Tags
- No battery; powered by the reader’s field.
- Typical read range: up to ~20 ft (technology dependent).
- Common for doors, gates, elevators, amenities.
Active Tags
- Contain a battery; can broadcast to the reader.
- Longer range (often up to ~100 ft) and higher cost.
- Used for vehicles or high‑value asset tracking.
RFID Frequencies: LF, HF, and UHF
LF (Low Frequency, ~125–134 kHz)
- Typical use: building entries, amenity doors, elevators, pools, gyms.
- Short read range (~10 cm), slower data rate, robust against interference.
- Common brands/tech: HID Prox, AWID, some Schlage systems.
HF (High Frequency, 13.56 MHz)
- Typical use: apartment unit doors, smart credentials, transit/ticketing.
- Read range: ~10 cm to 1 m (system dependent).
- Tech examples: MIFARE Classic/Plus/DESFire, iCLASS SE, some Schlage.
UHF (Ultra‑High Frequency, ~860–960 MHz)
- Typical use: parking tags, vehicle gates, long‑range readers.
- Longer ranges (meters), faster data rate, more sensitive to interference.
- Examples: UHF windshield stickers, garage tags (Nedap, TagMaster, etc.).
Dual‑frequency systems: Some properties pair LF for amenities with HF for unit doors, meaning your building may use both.
Apartment & Community Use Cases
- LF (125 kHz): gates, amenities, elevators, shared spaces.
- HF (13.56 MHz): unit front doors and smart locks.
- Dual‑Frequency: both of the above in one system.
Duplication Options & Turnaround
Clone From Home Kit
- Plug‑and‑play on Windows or macOS.
- Includes compatible rewriteable fobs or stickers.
- Ideal for authorized personal copies and spares.
In‑Person Service
- Typical visit: ~10 minutes per copy.
- Verification + instant testing.
- 100% secure process.
Buyer’s Guide: Picking the Right Option
- Identify your tech: LF (amenities), HF (unit door), or dual. For parking, check UHF tags/stickers.
- Check compatibility: Use our Compatibility page or send photos.
- Choose media: Standard fob, key card, or adhesive sticker.
- Choose service: Home kit or in‑person.
- Keep a spare: Especially helpful for guests, cleaners, caregivers, or Airbnb operations.
Security & Legal Considerations
- Only duplicate fobs you own or are explicitly authorized to copy.
- Follow your HOA/property’s policies; some properties require registration.
- We verify customer authorization and maintain secure handling protocols.
Troubleshooting & Compatibility Tips
- Doesn’t scan? The system may use a protected format—contact us with photos/model.
- Intermittent reads? Try a different media (card vs fob vs sticker) or reposition sticker on phone/holder.
- Parking tags (UHF): Ensure correct windshield placement and no metallic tint obstruction.
- Dual‑frequency: You may need a dual‑tech solution if your property uses both LF + HF.
FAQs
What are the most common apartment fobs?
LF 125 kHz passive fobs for amenities and HF 13.56 MHz for unit doors. Some properties use dual‑frequency systems.
Can you copy HID Prox, Schlage, Salto, or AWID?
In many cases, yes—subject to compatibility and authorization.
Is a sticker as reliable as a fob?
Stickers are convenient and often work great. For best results, place them on a non‑metallic surface away from other RF sources.
How fast can I get a copy?
In‑person copies are typically done in ~10 minutes.
About Sumokey (Experience • Expertise • Authoritativeness • Trust)
Sumokey specializes in residential RFID duplication and user‑friendly clone‑from‑home kits. Our engineering team designs hardware and software purpose‑built for common apartment fobs and parking tags, minimizing setup and avoiding complex firmware/terminal steps. We back our services with secure handling, compatibility guidance, and responsive support.