RFID Keyfobs
RFID ID Keyfob
Reference TK21 · RFIDPrime
TK4100 for Community & Building Access
- Material
- ABS
- Size
- 45 × 30 mm
- Operating frequency
- 13.56 MHz / 125 kHz / 915 MHz
- Product advice on format, chip and reader compatibility
- Free digital proof — production starts only after your approval
- Free samples — you only pay express shipping
- Production in 10–15 working days after approval
OEM/ODM: custom chips, shapes, colors and logo printing available on request.
Quantity & budget reference
Select a quantity to carry into your inquiry. Prices below are historical planning references.
Budget reference · USD
Select order quantity
Order total at 100 pcs: $37.00 ≈ ¥2.50 / pcs
Order ≥500 pcs and save 3%
10,000+ pcs Volume order? Get a dedicated quote →Minimum order: 100 pcs
USD prices are indicative, converted from CNY at the rate of 0.147612 (2026-07-28).
Historical reference, converted from CNY on 2026-07-28. Final pricing depends on the chip, artwork and quantity. Request a current quote.
The details
Overview
The TK21, from our RFID Keyfobs range, is produced factory-direct by Yueqing Haoka Technology Co., Ltd. in Wenzhou, China. It is built around the UHF (EPC Gen2) chip — 860–960 MHz (UHF), 96-bit EPC + user memory (chip-dependent) (ISO/IEC 18000-6C). The housing is made of abs. Typical applications include access control, attendance, all-in-one card systems, parking. The minimum order is 100 pcs. OEM/ODM customization — logo printing, colors, shapes and chip encoding — is available on request. Ask for pricing based on your final specifications and quantity.
01How it works
Hold the fob near a 125 kHz or 13.56 MHz reader and it returns its unique ID instantly — the basis of door access, lift control and time attendance. Chip and antenna are molded inside the one-piece ABS shell, so there is nothing to wear out or open.
02Key features
- One-piece injection-molded ABS shell, splash-proof for daily carry
- Reinforced key-ring hole; survives drops and pocket wear
- Per-fob laser numbering, engraving or silk-screen logo
- OEM/ODM from 100 pcs — chip, colors, logo and packaging built to your spec
03Where it’s used
The standard credential for apartment entrances, offices, gyms, elevators and parking barriers worldwide.
Technology, compared
| Chip | UHF (EPC Gen2) This product | TK4100 | T5577 | MIFARE-compatible S50 1K |
|---|---|---|---|---|
| Frequency | 860–960 MHz (UHF) | 125 kHz (LF) | 125 kHz (LF) | 13.56 MHz (HF) |
| Standard | ISO/IEC 18000-6C | EM4100 compatible | EM/HID format emulation | ISO/IEC 14443 A |
| Memory | 96-bit EPC + user memory (chip-dependent) | 64-bit read-only ID | 330-bit rewritable (7 user blocks) | 1 KB EEPROM, 16 sectors × 4 blocks |
| Typical use | Long-range, multi-tag reading for logistics, warehouse, vehicle windshield tags and industrial laundry. | Access control badges, time attendance, membership and parking systems that need a fixed serial number at the lowest cost. | Hotel lock systems, multi-format readers and card duplication/migration — the ID can be re-programmed in the field. | Public transport, access control, e-wallet, campus and loyalty cards that store data in protected sectors. |
The details
Product specification
| Size | 45 × 30 mm |
|---|---|
| Colors | Black, white, red, blue — customizable |
| Process | Injection molding |
| Chip options | IC or ID chips |
| Operating frequency | 13.56 MHz / 125 kHz / 915 MHz |
| Key features | Waterproof, compact, easy to carry; laser numbering, engraving and silk-screen logo available |
| Origin | Zhejiang, China |
| Model | TK21 |
| Customizable | Yes |
| Applications | access control, attendance, all-in-one card systems, parking |
| Material | ABS |
| Operating temp. (°C) | -20~50 |
| Brand | RFIDPrime |
| Samples | Free samples available — buyer pays express shipping |
| Production lead time | 10–15 working days after proof approval; stock items dispatch fast from ~1,000,000 pcs standing inventory |
| Customization (OEM/ODM) | Logo printing, colors, shapes, chip encoding and numbering — free digital proof before production |
Made for your project
From idea to production
- 01
Define the brief
Tell us quantity, chip type and artwork (drawing or sample — any format). We reply within one business day with a firm quote.
- 02
Review the details
You receive a free digital proof (and free physical samples — you pay only express shipping). Revise until it is right.
- 03
Approve & produce
We start production only after your written approval. Custom orders take 10–15 working days at up to 30,000 pcs/day capacity.
- 04
Express dispatch
Stock items ship fast from ~1,000,000 pcs standing inventory. Worldwide express or freight — packed for export.
Product Details
The details
Frequently asked questions
What is the minimum order quantity for the TK21?
The MOQ is 100 pcs. Unit prices drop at the volume tiers shown above; for quantities over 10,000 pcs, ask for a dedicated volume quote.
Can I get samples before placing a bulk order?
Yes. Samples are free — you only pay express shipping. Approve the sample first, then scale to volume with confidence.
How long does production and delivery take?
Custom orders are produced in 10–15 working days after you approve the free digital proof. Stock items dispatch fast from our standing inventory of about 1,000,000 pieces.
Can you print our logo or make a fully custom version?
Yes — OEM/ODM is our core business. Send your drawing or sample and we handle tooling, chip encoding, printing and packaging. You get a free digital proof, and production starts only after your written approval.
Which chip should I choose?
This product uses UHF (EPC Gen2). Match the chip to your readers: 125 kHz (TK4100/T5577) for legacy access systems, 13.56 MHz (S50/F08) for MIFARE-compatible systems, NTAG213 for smartphone/NFC use. Send us your reader model and we will confirm compatibility before you order.
Can each unit be encoded or numbered individually?
Yes — chip encoding, laser numbering, sequential numbers and barcode printing are available. Supply your data file with the order and we encode before shipment.
Are you a factory or a trading company?
We are the factory: a 1,500 m² plant in Yueqing, Wenzhou, running since 2006, ISO 9000 and CCC certified, with up to 30,000 pcs/day capacity. You buy factory-direct with no middlemen.
Ready to order or need a custom quote?
Tell us your quantity, chip type and artwork — we reply within one business day.