How long is the effective life of the key fob?

The effective life of the key fob is up to 10 years.

What are the common sizes for the key fob?

Common sizes include 27.9*35mm and 31*40.2mm, with thicknesses of 6.5mm or 5.3mm.

What are the main applications for this RFID key fob?

It is widely used in access control, attendance, logistics, industrial automation, gaming, public transportation, and e-payment.

125kHz Passive Tk4100 Em4200 T5577 RFID Smart Keyfob

Name: 125kHz Passive Tk4100 Em4200 T5577 RFID Smart Keyfob
Brand: JingZhou SynTek Smart Technology Co., Ltd.
SKU: 886316895

Hunan, ChinaJingZhou SynTek Smart Technology Co., Ltd.

US$0.05-0.80

500 Pieces

Sample price:US$0.50/piece.Request sample

Product profile

Customization

Available

Shape

Customized

Kind

IC Card

Type

Non-contact

Application

Social Security Card, Community Card, Hotel Card, Enterprise Card, Traffic Card, Supermarket Card, Campus Card, Smartcard Application

Style

Keychain

Color

Grey,Blue,Red,Green,Black,Ect

Reading Range

1-5cm

Protocol

ISO11784/785

Effective Life

10 Years

Power Supply Mode

Passive Card

Frequency

Low Frequency or High Frequency

Transport Package

Package: 100PCS/Bag, 5000PCS/CTN Weight

Specification

customized

Trademark

OEM

Origin

Shenzhen

HS Code

8523521000

Production Capacity

50000pieces/Day

Key features

Customizable Colors: Available in Grey, Blue, Red, Green, Black, Yellow, and other custom colors.

OEM & ODM Services: Full OEM manufacturing and ODM services accepted for RFID smart key fobs.

Wide Frequency Range: Supports Low Frequency 125KHz and High Frequency 13.56MHz for diverse applications.

Durable Materials: Constructed from ABS, silicone, PVC, leather, and epoxy for long-term use.

Long Effective Life: Designed with an effective operational life of up to 10 years.

Fast Lead Time: Standard lead time is 7 days after payment confirmation.

Multiple Chip Options: Compatible with TK4100, EM4305, T5577, F08, F32, MF50, and NTAG series chips.

Versatile Applications: Ideal for access control, attendance, logistics, gaming, and public transportation.

Company profile

JingZhou SynTek Smart Technology Co., Ltd.

Hunan, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service AvailableExport Year: 2019-04-29 CertifiedNearest Port: Shenzhen PortAverage Response Time: ≤3.66h CertifiedTerms of Payment: T/T, PayPal, Western Union

AI-Powered supplier vetting

SummaryJingZhou SynTek Smart Technology Co., Ltd. is a China-based limited company and factory established in 2017, focused on RFID cards, tags, labels, blocking cards, key fobs, smart cards, and related products. The supplier reports 182 employees, five production lines, 11–20 quality-control staff, four years of R&D-engineer experience, and peak- and off-season lead times within 15 workdays. It offers custom functions, shapes, and materials, maintains its own mold production line, and states that it can develop readers and chips. Export activity began in 2019, with 71%–90% of sales reportedly from exports and Europe identified as a primary market. The evidence supports manufacturing, product development, customization, and international sales capabilities. However, no formal certification, detailed after-sales process, or independently verifiable customer references are provided. Financial information is not assessed.

Supplier typeThe supplier is identified as a factory/manufacturer in the manufacturing industry and operates as a limited company established in China. Its stated product scope centers on RFID cards, tags, labels, blocking cards, key fobs, and smart cards, indicating a specialized RFID-related manufacturing supplier.

After-Sales capabilityThe supplier states that it provides technical consulting, support, professional technician assistance, and customer service. These statements indicate an available support orientation, but no detailed after-sales workflow, warranty terms, response standards, or service performance evidence is provided.

R&D capabilitySynTek reports its own mold production line, capability to develop readers and chips, R&D and manufacturing of RFID products, and research into blocking key cases and phone cases beginning in 2017. The supplier is also associated with high-tech and technology-based enterprise classifications, supporting an innovation capability assessment.

Production capacityThe supplier reports five professional production lines, 11–20 quality-control staff, peak-season and off-season fulfillment within 15 workdays, and a monthly output of approximately 400,000 TM tags for the Russia market. It also describes manufacturing across multiple RFID and blocking-product categories, providing explicit evidence of production capacity and operational breadth.

Customization capabilityThe supplier explicitly offers customized tags and labels by function, shape, and material, and states that it can design products in different quantities and sizes. Its own mold production line further supports the stated ability to develop customized product forms.

Client casesThe supplier states that it has been a leading blocking-card supplier to the Europe market during the past three years and the biggest TM-tag supplier to the Russia market, with reported monthly output of approximately 400,000 pieces. These are supplier-reported market examples, but no named customers, contracts, or independently verifiable case studies are provided.